The immune system's third line of defense is called specific resistance or acquired immunity. The system depends on antigens which are mostly proteins which function as a producer of the immune response.
waris
No. Vampires are not real first of all and second there are different blood types. People when they need blood for medical reasons have to have the same blood type from a blood bank . A person would get sick and die from having different blood types and from drinking blood as food.
The blood coagulation which you are referring to has several stages and types. The main cells involved directly are thrombocytes, while endothelial cells etc may also play a role. There are also soluble factors of the blood involved. (see coagulation cascase) See http://en.wikipedia.org/wiki/Coagulation
Negative and Positive blood types refer to the presence of the Rhesus D (RhD) antigen. Rhesus is the second main blood group typing after the A,B,O system. e.g. AB+ means the blood cells have A and B and RhD antigens present on the blood cell surface. O- means that A and B and RhD antigens are not present on the surface of the blood cell.
Blood AB.
there are 2 types of cow blood- cow blood and baby blood
They can have a lot of blood-types
blood types a+ and o_
Absolutely - all blood types can have children together. The only problem relating to these blood types for pregnancy would be if the mother is negative and her first child was positive. Then there may be a problem if her second child is also positive.
Zone, man, and press/trap
The body has three main lines of defense against pathogens. They are as follows:First line of defense: Skin, Mucous membranes, and Secretions of skin and mucous membranesSecond line of defense: Phagocytic white blood cells, Antimicrobial proteins, and the Inflammatory responseThird line of defense: Lymphocytes, and Antibodies
There are several different types of blood cells humans. Perhaps the most important are Red Blood Cells or Erythrocytes that are involved in the transport of Oxygen and Carbon Dioxide. They are round and flat, usually about 7.5μm in diameter and 2.5μm thick NB 1mm=1,000μm or 1inch=25,400,000μm Other blood cell types include various types of Granulocytes and Agranulocyes that are involved in immune response and vary in size from 5μm to 25μm across and platelets which are instrumental in clotting which are 2μm to 4μm across.* *Marieb & Coehn, Human Anatomy and Physiology, 8th ed.