Body fluids and circulation

1. Blood ( special connective tissue)

1.1. 1. Blood plasma (55%)

1.1.1. 90-92% water

1.1.2. 6—8% proteins

1.1.2.1. 1- Fibrinogen ( helps in blood cloting) 2- Globulin. ( hepls in defence machanism) 3-Albumin. ( maintain osmotic balance)

1.1.3. 1-2% Minerals i.e Na+ ,Ca2+ ,Mg2+ ,HCO3- ,Cl-

1.2. Formed elements( 45%)

1.2.1. Erythrocytes (red blood cells)

1.2.1.1. 5—5.5 millions mm-3 Formed in Red bone marror *No nucleus* Biconcave in shape in mammals Life span 120 days 😊

1.2.1.1.1. RBC contains *12-16gms haemoglobin in 100ml of blood*

1.2.1.1.2. Spleen - graveyard of RBC 🛌

1.2.2. Leucocutes ( white blood cells)

1.2.2.1. 6000-8000 mm-3 Lack haemoglobin so courless

1.2.2.1.1. 1.Granulocytes 2.Agranulocytes