Blood is the circulatory fluid present within the blood vessels. It is highly complex substance composed of a large variety of dissolved and suspended materials.
Volume:
In adult male the volume of the blood is 5 liters but in case of female it is about 4.6 or 4.8.
PH of blood:
The PH of the blood is 7.4----7.6.
Rate of flow of blood:
The rate of flow differs in various blood vessels. In aorta it is high nearly 400----500 mm/second. It greatly reduced in the capillary which is about 1 mm/second and increase in large vein and is about 150 mm/second.
Specific Gravity:
Specific gravity of blood is 1.055-----1.060. Specific gravity rapidly fall after the birth due to destruction of R.B c’s and is increased when H2 O is lost from the body e.g diarrhea.
Composition of Blood:
If blood is put in a test tube along with some anticoagulant, it quickly separates into two layers, the upper yellowish and Semi-transparent layer is the plasma and the lower layer contains the blood cells i.e 1.R.B.c 2.W.B.c 3.Platelets
Posted by: Wasim Javed