physiology Unit 5 blood

 Unit 5                                                       Part 1

                                     Blood

Circulatory System (blood formation, composition , blood group, blood coagulation )

Circulatory and Lymphatic System

The circulatory system- blood :- blood is a fluid connective  tissue. It circulates continually arround the body. It provides one of the means of communication between the cells of different parts of the body and external environment. Blood is composed of a clear,straw coloured , watery fluid called plasma in which different types of blood cells are suspended.

Composition and formation of blood

Physical properties of blood

# Amount:   blood constitutes about 7to9% of total body weight.

# Colour: Red colour due to presence of haemoglobin (red pigment) 

# Viscosity:3.5to5.4 it is thicker, heavier and viscous than water.

# Ph: It is slightly alkaline. It's ph between 7.35 to 7.45 

# Temperature: temperature of blood is about 38° (100.4°F)

Composition of blood

Plasma normally constitutes about 55% cell, about 45% blood volume.

Plasma:- The constitutes of plasma are water and dissolved substance including----

# Plasma protein

# In organic salt

#  Nutrients

#  Waste materials

#  Hormones

# Gases