Question

What are capillaries? ​

Answer 1

Answer:

• Capillaries are the minute thin walled vessels of the body.
• Any of the smallest arterioles with venules and it forms network to the body.
• In other words it is the smallest blood vessels.
• It is about 5-10ums big.
• It enables to move oxygen, carbondioxide, water and other chemical waste as well as other nutrients in between blood and surrounding tissues.
• Capillaries are situated within the tissues of body.
• It transport blood from arteries to viens.
• The exchange of chemical waste, oxygen . nutrients etc are happens through two ways : 1. Passive diffusion 2.Pinocytosis.
• There are three types of capillaries  : 1. Continuous capillaries  2.Fenestrated capillaries  3.Sinusoid capillaries.

Explanation:

Answer 2

• Capillaries are the fine branching blood vessels, which form a network between arterioles and venules.

• Diameter of capillary is avg 8 micro meter.
• Wall of capillary is one cell thick.
• They do not consists of veins.
• They forma highly branched network called the capillary bed.
• They allows the movement of oxygen, nutrients and metabolic waste between blood and extracellular fluid.
• Capillaries involved in micro circulation.
• Occurs in skeletal muscle, skin, gonads, renal glomerulus, etc.
• They have a basal lamnia, supporting endothelial cells.
• Types of capillaries are - 1. Continuous capillaries, 2. Fenestrated capillariea and 3. Discontinuous capillaries.