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Exercises

  1. Answer the questions:

  1. When did the study of physiology begin?

  2. What helped medical physiology develop rapidly?

  3. Did chemistry influence the development of physiology?

  4. What were the objects of J. Muller's explorations?

  5. What organ systems are defined in physiology?

  6. What does cell physiology study?

  7. What is physiological chemistry concerned with?

  8. Why has interest in the nervous system dramatically increased?

  9. What does the word "anatomy" mean in the Greek language?

  10. Anatomy deals with the structural organization of living things, doesn't it?

  11. Are anatomy and physiology closely related sciences? Why?

  12. Why is anatomy considered to be the basic life science?

  13. What are the principles of anatomy's subdivisions?

  1. Talk it over:

– history of physiology;

– physiological principles;

– study of organ systems.

  1. Prove that:

– anatomy is closely related with physiology;

– all living things can be studied anatomically;

– anatomy is a broad subject.

4. Render the text into English:

Слово "физиология" было впервые использовано греками. Многие идеи, важные в развитии физиологии, были сформированы в книге Гиппократа. Физиология как отдельная наука использует химические и физические методы. В 17-ом веке наука основывалась на анатомических экспериментах. В 18-ом веке была издана работа французского ученого Лавуазье, которая имела успех и стала основой дальнейших исследований. В 19-ом веке физиология стала развиваться более быстрыми темпами, возникла необходимость изучать физиологию во всех живых организмах с медицинской точки зрения. Эксперименты, выявившие единство структуры и функций во всех живых организмах, повлияли на развитие теории общей физиологии. Современная физиология имеет мало общего с физиологией 19 века.

Unit 11 Human Anatomy

The human body operates through systems that are summarized below.

I. Circulatory System

In passing through the system, blood pumped by the heart follows a winding course through the right chambers of the heart, into the lungs, where it picks up oxygen, and back into the left chambers of the heart. From these it is pumped into the main artery, the aorta, which branches into increasingly smaller arteries until it passes through the smallest, known as arterioles. Beyond the arterioles, the blood passes through a vast amount of tiny, thin-walled structures called capillaries. Here, the blood gives up its oxygen and its nutrients to the tissues and absorbs from them carbon dioxide and other waste products of metabolism. The blood completes its circuit by passing through small veins that join to form increasingly larger vessels until it reaches the largest veins, the inferior and superior venae cavae, which return it to the right side of the heart. Blood is propelled mainly by contractions of the heart; contractions of skeletal muscle also contribute to circulation. Valves in the heart and in the veins ensure its flow in one direction.

What is blood?

Blood looks like an ordinary liquid. Using a microscope, however, it is possible to see cells floating in a watery liquid called plasma.

Plasma

Plasma is a pale yellow liquid. It is 90 % water and 10 % dissolved substances. These dissolved substances include:

• soluble foods from digestion, e.g. glucose, amino acids and fat droplets;

• salts (minerals) as ions, e.g. Na+, Cl-, Ca2+;

• hormones in minute traces, e.g. insulin and adrenaline;

• waste products, e.g. carbon dioxide and urea;

• blood proteins, e.g. globulin, a protein consisting of antibodies, albumen, which thickens the blood, sindfibrinogen, which is needed for clotting.

Fibrinogen can be removed from plasma. This is done by allowing the plasma to clot and then removing the clot. The remaining plasma without fibrinogen is called serum. Serum is stored in hospitals for transfusions.

BLOOD

PLASMA

CELLS

 

 

Red blood cells

White blood cells

Platelets

transports food, waste products and other chemicals.

carry oxygen

around the body. Haemoglobin in the cells combines with oxygen in the lungs to form oxyhaemoglobin. This is transported in the blood to tissues all over the body.

help to protect us against disease.

There are two kinds of white blood cells:

• Phagocytes which kill bacteria by engulfing ("eating") them. They often die loaded with dead bacteria. This is what forms yellow "pus".

• Lymphocytes which produce chemicals called antibodies. These dissolve in plasma killing bacteria and making poisons harmless.

are bits of broken up blood cells. Platelets help the blood to clot.