Lesson stages:

Teacher's activities

Beginning of the lesson

Warm-up activities

Good morning, my dear students. I am very glad and happy to see all of you today. How are you?

Answer my questions, please.

1. What date is it today?

2. What day of the week is it today?

3. What is the weather like today?

Checking up the home task:

Check up the home task: ex. 161-163, p. 130-132 (Грамматика сборник упражнений-Ю.Голицынской)

Ex.161 Insert the verb to be in the Past Simple.

My aunt ... very depressed last Sunday. The weather ...terrible. It ... cold and rainy. Her husband ... not at home. He ... at hospital because he ... sick. Her children ... not at school. They ... not in the yard, they ... in the living room. The TV ... broken. The children ... not only upset, they ... very angry. The neighbours ... not happy because her children ... too noisy. The house ... not clean. The sink ... broken. There ... dirty dishes on the kitchen table and in the sink. There ... nothing in the fridge. There ... no vegetables for dinner, there ... no juice for her children. There ... not even bread in the house! She ... tired and hungry. She ... just exhausted.

Discussion point

One popular book on physiology figuratively says: "At every second in the red sea millions of ships are wrecked and sink to the bottom. But millions of new ships are sailing out of the harbors again... What is meant by the Red Sea, ships? Harbors? Let's start with the Red Sea - is ...

So, the theme of our lesson is "Blood". And the French physiologist Claude Bernard called blood "the mirror of the body" - is it really so? Let's take a look at it. What do we need to do for this? Study blood composition Study blood cell structure, blood functions.

Main part

Blood, continuously circulating in a closed system of blood vessels, performs the most important functions in the body: transport, respiratory, regulatory and protective. It provides relative stability of the internal environment of the body.

Erythrocytes - nuclear-free red blood cells, which have the form of double concave discs. This form increases the surface of the cell by 1.5 times. erythrocyte cytoplasm contains hemoglobin protein - a complex organic compound consisting of a protein globin and a blood pigment hem, which includes iron.

White blood cells - white blood cells that contain nuclei and have no permanent form. In 1 mm3 of human blood they contain 6-8 thousand.

Platelets (blood platelets) - colorless, non-nuclear cells of rounded form, which play an important role in blood clotting. In 1 liter of blood is from 180 to 400 thousand platelets. They are easily destroyed when the blood vessels are damaged. Thrombocytes are formed in the red bone marrow.

Ex. 1. Match the texts to the drawings

1. Erythrocyte is a double-curved nucleus-free disk containing the pigment hemoglobin (hemo-iron; globin-protein). The main function of oxygen transport.

2. Thrombocytes are small plates that patch up "holes" in vessels containing thromboplates and are involved in blood coagulation.

3. white balls capable of "devouring" foreign bodies (viruses and bacteria), which are responsible for immunity.

Ex.2 The game "Faith-Not Faith."

Read the suggestions. Evaluate their correctness: if the sentence is correct, put "+"; if the sentence is wrong, put "-".

1. Blood is a hard tissue.

2. Blood is liquid connective tissue.

3. Plasma takes 50% of the volume of blood.

4) Erythrocytes have no formal nucleus.

Erythrocytes have a protective function. 5.

6. Leukocytes are the largest blood cells.

7. Thrombocytes are involved in the formation of the thrombus.

8. Red blood clot is formed only by red blood cells and thrombocytes.

Ex.3, p.101- Read the text “the circulation of the blood”, translate them and put questions to the second paragraph.

Ex. 4, p. translate the following sentences:

The human heart begins to beat and pump blood quicker than usual during the emotional stress. The human heart makes 60-80 contraction per minute. On physical exertion the heart has a short period of rest and the diastole becomes less. The heart acts as a pump discharge out the blood to peripheral and pulmonary systems. Ten tones of blood are pumped through the heart daily. John Floyer, an English doctor was the first scientist to find out the varying pulse rate in men.

Conclusive stage

Feedback

Home task

Let's go back to Claude Bernard's owls, "Blood is a mirror of the body", is it? (pupils' conclusions) Blood is the river that sustains life and carries it within itself. However, you will not see such a river in any of the natural landscapes... This river flows within each of us.

Feedback:

- Guys, it's time to sum up the lesson. Let's remember the tasks that the capital has before us: Study blood composition Study the structure of blood cells, study blood functions - Do you think we have coped with the tasks, reached the goal of the lesson? - Now I suggest that you shoot at the "Reflexive Target" .if you score "5" we show 5 fingers, "4", 3, 2 - the corresponding number of fingers.

Home work: ex. 8, p.103 (Essential English for medical students -Маслова А.М)