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Chromatin And Chromosomes

DNA does not exist as a naked double helix in the nucleus of a cell, however, is complexed with proteins to form a great filamentous material called chromatin. In many cells, the chromatin takes place as 46 long filaments called chromosomes. There is a stupendous quantity of

Muscle Tissue And Types of Muscle Tissue

MUSCLE TISSUE is the only tissue in the body that is specialised for contraction (shortening). The body contains three types of muscle tissue: skeletal, smooth, and cardiac. Each type of muscle tissue exhibits unique structural and functional characteristics. Contraction of skeletal muscle tissue produces locomotion, movement of

Human Blood Types – Importance And Blood Typing Antigens & Antibodies In Abo & Rh Blood Type.

Several different blood types occur in humans. The most familiar ones involve the ABO blood group (types A, B, AB, and O) and the Rh blood group (Rh+ and Rh-). Blood types are classified by the presence or absence of certain antigens, which are glycoproteins and glyco-

Factors Influencing Breathing

The respiratory areas of the medulla oblongata and pons are influenced by a number of factors that cause modifications in the rate and depth of breathing. Factors involved in involuntary control are detected by sensory receptors, which forward nerve impulses to the DRG. Higher brain centers involved

Hormonal Control of Pregnancy

Without the formation of a preembryo, the corpus luteum degenerates about two weeks after ovulation as a result of the decline in luteinizing hormone from the anterior lobe of the pituitary gland. The resulting decline in blood levels of estrogens and progesterone causes the endometrium to break

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