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DIDAVISION


�WHAT IS BLOOD?


WHAT IS BLOOD?
WHAT IS BLOOD?

How blood transports oxygen, food and hormones to cells. Composition of blood. Blood groups. Blood transfusions and RH factor. Summary.


INTRODUCTION

- Vertebrates have a complex network of tubes through which blood flows.
- The heart drives the blood which is transported through this intricate network of pathways called arteries, veins and capillaries.
- The speed of the circulation of blood
- Functions of the blood: it carries oxygen and absorbs carbon dioxide. It also transports nutritive sustances and collects waste materials.
- Blood transports hormones. The functions of hormones in the human body.
- The constant motion of blood distributes warmth throught the body, thereby helping to maintain a constant body temperature. Furthermore blood represents a barrier against possible invasions by foreign intruders.


TEMPERATURE

- Temperature of amphibians, reptiles and fish
- Temperature of mamals and birds

HUMAN BLOOD

- Characteritics of the human blood. Its composition.
- Characteristics and composition of plasma.
- Serum
- Red Corpuscles or hemacrits
- The function of haemoglobin. Anaemia.
- Number of hemacrits in the human blood.
- White corpuscles or leukocytes. Their function.
- Platelets or thrombocytes
- Importance of the platelets

BLOOD TRANSFUSION

- In days gone by, it was thought that everybody had the same type of blood.
- Blood transfusions. Blood Groups. Rh Factor.
- Types of blood: 0, AB, A and B
- Donation of the different types of blood.

SUMMARY

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