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5 Cards in this Set
- Front
- Back
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Briefly |
- Consists of the heart, blood vessels and the blood. - blood vessels 3 kinds: arteries, veins and capillaries - heart pumps the blood all around the body - the blood vessels deliver the blood to cells - the blood contains nutrients, gases, wastes, minerals etc. - materials move in and out between capillaries and cell. |
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Tasks |
- maintaining homeostasis - transporting O2, CO2, hormones, nutrients, waste products - regulates body temperature - part of immune system |
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The Blood |
- is fluid-like connective tissue - consists of blood cells and plasma
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The Blood: Blood cells 50% |
Blood cells (50% of blood)- made in bone marrowRBC (erytrocytes) • haemoglobin > binds oxygen > made of iron > made in liver - bends, disc-like shape- no nucleus or other organelles WBC (leucocytes)- fights off disease- most phagocytes • macrophages • neutrophils- Some lymphocytes • B-cells > antibodies • T-cells > helper T-cell: controls immune system > killer T-cell: kills own infected cells- found in tissues, lymph nodes, lymph Platelets (thrombocytes)- help blood clotting- prot. Fibrinogen > Fibrin net - Fibrin sticks blood cells together- done by enzyme trombin(K-vitamin) Disease: Hemofilia |
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The Blood: Plasma |
Plasma (50% of blood) Water 90% - works as a solvent - contains nutrients: • minerals • glucose • amino acids • gases • hormones - waste products Proteins - eg. albumin, lipoprotein, fibrinogen, antibodies - transports hormones and drugs - made in liver |
