Definition: transport system refers to the movement of metabolic materials from various parts of the organism, where they are either useful stored or removed.
Need for transport system
Transport system is necessary in order to ensure that materials are needed or removed.
As organisms become larger, their body surface area also becomes increase.
Materials transported in living things include
- oxygen and water
- waste products
- mineral salts from root, stem deals of plants
- hormones both in plants and animals 5) amino acids from small intestine to body cells
Major media of transport system
a) cytoplasm
b) cell sap or intex
c) lymph
d) blood
Functions of blood
A) Transportation of materials like oxygen with haemoglobin
B) carbon (iv) oxide from tissue, a living for excretion.
C) hormones and nitrogenous waste and antibiotics.
D) regulation of body temperature by distributing uniform heat.
Blood vessels - arteries -are blood vessels that carries blood away from the heart to the body
- veins -are also blood vessels that carries blood from the body to the heart
- capillaries-join an arteries to a vein. It is found in the junction between an artery and a vein.
Difference between an artery, vein, capillaries
1)arteries carry blood away from the heart
Vein return deoxygenated blood to heart
Capillaries carry mixed blood - arteries flow in high pressure
Vein flow under lower pressure
Capillaries flow under pressure.
Transport system in heart - blood (circulatory fluid)
- heart (pumping organs)
- blood vessels (arteries, vein and capillaries).