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Friday, February 26, 2021

Thursday, February 25, 2021

Projects. 10th Grade


Общие
правила

Любой лицеист, учащийся 10 класса может сделать, оформить, показать и сдать на всеобщее обозрение свой проект. Темой проекта может являться заданная тема в разных вариациях в зависимости от понимания учащегося и данной цели учителя. В результате, выполненная работа и права на нее переходят в пользование Biology Department LI7. В одной параллели не более пяти людей могут взять одну тему и работать над ней. Дополнительную и напутственную информацию можно взять у учителя биологии.

Отметки даются соответственно:

Пять обязательных:

1.    Проектный лист

2.    Выполненная работа

3.    Информативность (наглядность, понятный, научность)

4.    Презентабельность (красочно, аккуратно сделанный проектный лист)

5.    Умение презентовать

Доп критерий: Все на английском языке!

Каждый критерий – одна отметка!

Время и контроль проекта.

1.       Выбор идеи и темы (до 26 февраля 2021 включительно). По ссылке

2.       Анализ примеров в группе + образование критериев (ближайший урок)

3.       1й черновик + анализ с помощью критериев (12 марта 2021 включительно)

4.       Обзор работы другим учеником (отзыв по критериям) (14 марта 2021)

5.       Улучшение работы (19 марта включительно)

6.       принести черновик учителю + анализ с помощью критериев (25 марта 2021)

7.       напутствие учителя (онлайн (имэйл) (25 марта 2021)

8.       улучшение работы (27 марта 2021)

9.       еще раз уже улучшенную работу учителю + анализ с помощью критериев (Онлайн (имэйл) (28 марта 2021)

10.   получение оценки + последнее напутствие (8 апреля 2021)

11.   защита проектов в общем холле, на трифолдах размещается отчет по работе (первые дни 4й четверти)


Saturday, February 13, 2021

Heart Dissection Lab

Here below is a HEART DISSECTION lab report (Heart Model pratice). We do the lab with the 8th graders. Enjoy!
Title: Heart dissection.
Purpose: to list and describe the principal structures of the mammalian heart; to identify important parts of the heart, to be able to explain heart work.
Equipment: dissection pan, heart, scalpel, scissors.
Background: The heart is a muscle that pumps oxygenated blood and nutrients throughout the body. A mammal's heart has four chambers. Two of those chambers are receiving chambers called the right and left atrium. The other two chambers are pumping chambers called the right and left ventricle. The efficiency in the cycle of blood depends on the serial contraction of the atriums and ventricles. Whenever the atriums contract this is called the systolic phase and whenever the ventricles contract this is called the diastolic phase.
Blood flow through the heart starts when the right atrium takes the blood that flows in through the superior or inferior vena cava. The right atrium then fills with blood and pressure causes tricuspid valve to open. The blood then goes into the right ventricle where it contracts the blood into the pulmonary arteries. These arteries lead to the lungs where blood is then oxygenated. The oxygenated blood then flows from the lungs to the left atrium through the pulmonary veins. Due to pressure the mitral valve, which leads to the left ventricle, opens up and pushes the blood into the left ventricle. The left ventricle then contracts and forces the blood through the aorta, which provides the rest of the body with blood.
Procedure:
Place the sheep’s heart in the dissecting tray and turn the heart so that the ventral (передняя) surface is facing you. Find the left and right atriums, the left and right ventricles, the aorta, the pulmonary arteries, and the superior and inferior vena cava. Turn the heart over to find the pulmonary veins. Next, explore the blood vessels that lead into and out of the chambers in the heart. Then, Locate a diagonal deposit of fat along the lower two-thirds of the heart. Use this fatty deposit to help you guide your incision into the heart.
Following the cutting diagram below study the anatomy of the right side of the heart. With the heart on the ventral side facing you and the apex pointing downwards, cut along line 1. Cut just deep enough to go through the atria wall and continue the cut into the right ventricle. With a probe, push open the heart at the cut and examine the internal structure. Cut along line 2 and extend the cut upward toward the pulmonary artery. Cut just deep enough to go through the ventricle wall. Complete the cut on line 3. Cut downward along the pulmonary artery around the wall of the right atrium and upward along the right of the superior vena cava. Carefully lift the resulting flap to expose the structures underneath.
Follow the cutting diagram below very carefully to study the anatomy of the left side of the heart. Start to cut on line 4 at the top of the left atrium and continue into the left ventricle. Cut just deep enough to go through the ventricle wall. Cut on line 5 across the middle of the left ventricle into the aorta. Leave a small margin between this cut and the cut previously made for line 2. Begin to cut on line 6 on the left atrium where cut 4 began. Extend this cut around and through the pulmonary artery upward on the aorta to the right of cut 5. Carefully lift up the resulting flap to expose the structure underneath.
Observe the thick septum dividing the left and right ventricles. Also note the thickness of the walls of the left ventricle. Locate the tricuspid valve between the right atrium and right ventricle. Locate the bicuspid valve between the left atrium and left ventricle. Observe that the valves are connected by fibers to the inner surface of the ventricle. Explore the openings in the valves. With a scalpel, cut across a section of the aorta and a section of the vena cava. Compare the thickness of their walls.
Dispose of your materials according to the directions from your teacher. Finally, clean up your work area and wash your hands before leaving the lab.
Result: We carried out all the stages of the lab work correctly.
While conducting part A …
In part B …
Conclusion:
  1. Trace the path of blood from the right atrium to the aorta.
  2. Pulmonary circulation carries blood between the heart and the lungs. Systemic circulation carries blood to the rest of the body. In what chambers of the heart does pulmonary circulation begin and end? In what chambers does systemic circulation begin and end?
  3. What is the function of the septum separating the left and right ventricles?
  4. What is the function of the mitral and tricuspid valves?
  5. Why are the walls of the left ventricle thicker than the walls of the right ventricle?
In part A … I think it was … It is also possible that the heart …

In part B … I think it was the result of … Point proven

Draw pictures and label them:
Heart Left Side

Heart Right Side

Heart Vessels

Saturday, February 6, 2021

How Heart Works. Blood 4 lesson

Hey everyone. Here is new biology lesson on Heart. What do you know about it? OK. Now, check if you can answer these questions:

  1. Describe the location and position of the heart within the body cavity
  2. Describe the internal and external anatomy of the heart
  3. Identify the tissue layers of the heart
  4. Relate the structure of the heart to its function as a pump
  5. Compare systemic circulation to pulmonary circulation
  6. Identify the veins and arteries of the coronary circulation system
  7. Trace the pathway of oxygenated and deoxygenated blood thorough the chambers of the heart
Could you?
Blood flows from the right atrium to the right ventricle, where it is pumped into the pulmonary circuit. The blood in the pulmonary artery branches is low in oxygen but relatively high in carbon dioxide. Gas exchange occurs in the pulmonary capillaries (oxygen into the blood, carbon dioxide out), and blood high in oxygen and low in carbon dioxide is returned to the left atrium. From here, blood enters the left ventricle, which pumps it into the systemic circuit. Following exchange in the systemic capillaries (oxygen and nutrients out of the capillaries and carbon dioxide and wastes in), blood returns to the right atrium and the cycle is repeated.
The heart wall also consists of three layers
Check if you can answer questions at the beginning.

Thursday, February 4, 2021

BLOOD 3


Learning outcomes for lesson 3 in blood series: 
- Not to get stuck in AB0 blood types stuff
- Clearly and concisely summarise facts and describe AB0 blood typing
Exercise 11: Answer questions after watching video https://goo.gl/CGHsDz
  1. Let's say your name is Ivan, you've survived a shipwreck and you're stranded on a desert island. You happen to have been stranded with a medical doctor that has a limited stock of medical supplies. One of your shipmates is in desperate need of a blood transfusion but doesn't know his blood type. You do know your blood type. How could you type his blood with your knowledge and limited medical supplies?
  2. There have been books written about how blood type affects personality or body shape. Knowing that blood type is determined by antigens on erythrocytes, are these claims scientifically valid? 
Exercise 12. Step one (individual work): Complete the table below by putting symbol OK in the correct place.
Recipient
Donor

0-
0+
A-
A+
B-
B+
AB-
AB+
0-








0+








A-








A+








B-








B+








AB-








AB+








Recipient - person who receives blood.
Donor - person who donates his or her blood.
Step two (pair work): Compare your results with the correct answers shown by your teacher and discuss them with your partner.
Step three (in group of 3 or 4): Work in group to answer these questions:
  1. Who can we call the universal donor? Explain.
  2. Who can we call the universal recipient? Explain.
Exercise 13. Step one (individual work): The following notes were written carelessly. Consequently they are full of content errors! The number of errors per sentence is indicated in parentheses (brackets). Please rewrite sentences where mistakes made making the necessary corrections.
In transfusion reactions, antibodies attach to antigens on the surfaces of erythrocytes and cause agglutination. ABO blood group antigens are called 0, A and B (1). People with type A blood have 0 antigens on their erythrocytes, whereas those with type B blood have A antigens (2). Those with AB blood have both A and B antigens, and those with type O blood have A or B antigens (1). The blood plasma contains preformed antibodies against the antigens not present on a person’s erythrocytes. 
Step two (work in pairs): Read the story and answer the question.
Following a motor vehicle accident, a patient is rushed to the emergency department with multiple injuries, causing severe bleeding. The patient’s condition is critical, and there is no time for determining his blood type. What type of blood is transfused and why?

Tuesday, February 2, 2021

Blood Components Lab work. 8th Grade

Blood Samples

Here the Blood Structure lab report. We do the lab with the 8th graders. Enjoy!

Title: Blood components and their differences.
Purpose: to get familiar with the structure of blood; to identify different blood cells from one another.
Equipment: blood sampling scarifier, slides, alcohol napkins.
Background: Erythrocytes - (also, red blood cell or RBC) mature myeloid blood cell that are composed mostly of hemoglobin and functions in the transportation of oxygen and carbon dioxide. Leukocyte - (also, white blood cell or WBC) colourless, nucleated blood cell, the chief function of which is to protect the body from disease. Platelets - (also, thrombocytes) one of the formed elements of blood that consists of cell fragments broken off from megakaryocytes, they help body to heal wounds. Plasma - in blood, the liquid extracellular matrix composed mostly of water that circulates the formed elements and dissolved materials throughout the cardiovascular system.
RBCs and other components

Procedure:

Result: We carried out all the stages of the lab work correctly.
While conducting part A …
In part B …
Conclusion: In part A … I think it was … It is also possible that the brain …

In part B … I think it was the result of … Point proven.