Blood Tissue

Blood Tissue
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
In vertebrates, it is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains dissipated proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves. Albumin is the main protein in plasma, and it functions to regulate the colloidal osmotic pressure of blood. The blood cells are mainly red blood cells (also called RBCs or erythrocytes), white blood cells (also called WBCs or leukocytes) and platelets (also called thrombocytes). The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates oxygen transport by reversibly binding to this respiratory gas and greatly increasing its solubility in blood.


Functions
- Supply of oxygen to tissues (bound to hemoglobin, which is carried in red cells).
- Supply of nutrients such as glucose, amino acids, and fatty acids (dissolved in the blood or bound to plasma proteins (e.g., blood lipids).
- Removal of waste such as carbon dioxide, urea, and lactic acid.
- Immunological functions, including circulation of white blood cells, and detection of foreign material by antibodies.
- Coagulation, the response to a broken blood vessel, the conversion of blood from a liquid to a semisolid gel to stop bleeding.
- Messenger functions, including the transport of hormones and the signaling of tissue damage.
. Regulation of core body temperature-
. Hydraulic functions -

Blood contains red cells, white cell populations and plasma 1-
2- Lymph normally contains only one type of white cell, lymphocyte. Fluid passes from the blood into the tissues, and the lymphatic vessels return that fluid to the circulation 3-

Blood is a Connective Tissue with a Fluid Matrix {plasma}
Ability to form fibers - Fibrinogen -> Fibrin 4-
Formed Elements {contains cellular component of tissue} 5-
Wrights Blood Stain {Eosin, RED acid stain, Methylene Blue, basic stain}
Erythrocytes a-
Neutrophilic Polynuclear cells b-