6. Circulation Flashcards
Plasma:
ions and proteins
55% of blood composition
non-living
Formed elements of blood:
Erythrocytes - red blood cells
Leukocytes - white blood cells
Platelets - cell fragments (metakaryocytes)
Blood is a type of ______ tissue
connective
Red blood cells:
anucleate, few organelles
carry oxygen around body
Hemaglobin:
an iron-bearing protein that carries the bulk of oxygen that is carried in the blood
Basophils
release histamine for inflammatory response
Monocytes
immature macrophage
Neutrophils
avid phagocytes at site of acute infection
Lymphocytes
become B and T cells, important for immune response
Eosinophils
defence against parasitic worms
Platelets
cell fragments necessary for blood clotting
Erythropoetin
hormone responsible for regulating RBC production
Erythrocytes
transport oxygen bound to hemoglobin molecules
Plasma contains:
90% water, dissolved substances eg. nutrients, salts, gases, hormones, proteins
Antigens
a substance that the body recognises as foreign, stimulates immune system to release antibodies