blood

Question 1

8 functions of blood

Answer 1

• transporting oxygen and nutrients to all cells
• transporting co2 and other waste products away from cells
• transporting hormones to cells
• painting the pH of body fluids
• distributing heat and maintaining body temperature
• maintaining water content and ion concentration of body fluids
• protecting against disease-causing micro-organisms
• clotting when vessels are damaged

Question 2

the structure of blood

Answer 2

blood is composed of
- plasma: the liquid part, makes up approx 55% of BV
- formed elements: the non-liquid part, makes up 45% of BV and consists of RBC, WBC, and platelets

Question 3

plasma
- structure and function

Answer 3

mixture of water with dissolved substances such as sugar and slats
function: transport components of blood (cells, nutrients, wastes, hormones, proteins, antibodies) throughout body

Question 4

Erythrocytes

Answer 4

red blood cells
40-45% of BV
- cells are biconcave, flattened in middle and raised sides, this increases SA for oxygen exchange
- do not contain nucleus, this increases flexibility to move through BV
- 120 life span
function: transport oxygen from lungs to cells

Question 5

Leucocytes
- function
- types

Answer 5

protects body from infection
1% of BV
- larger than RBC
neutrophils: contain enzymes ro digest pathogens
monocytes: engulf pathogens and aged/damaged cells
lymphocytes: immune response - cell-mediated immunity yes T-Lymphocytes and antibody-mediated immunity uses B-lymphocytes
basophils: responsible for allergic reactions
eosinophils: lead to inflammatory responses

Question 6

Thrombocytes

Answer 6

or platelets
small fragments of cells that adhere to lining and from a. scaffold for the coagulation of the blood to form a clot