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General Biology: Definitions and explanations page 16 PDF | Download eBooks

Learn general biology terms with definitions and explanations, biology terminologies (Page 16) for biology degree programs.


  1. What is Stomach?
    The stomach is a muscular, hollow organ in the gastrointestinal tract of humans and many other ...
  2. What is Gastric juice?
    Gastric juice is a strongly acidic liquid secreted by the glands in the lining of the ...
  3. What is Chyme?
    Chyme or chymus is the semi-fluid mass of partly digested food that is expelled by the ...
  4. What is Protease?
    A protease is an enzyme that helps proteolysis which is the process of protein catabolism by ...
  5. What is Pepsin?
    Pepsin is an endopeptidase that breaks down proteins into smaller peptides. it is produced in the ...
  6. What is Pepsinogen?
    Pepsin's proenzyme, pepsinogen, is released by the chief cells in the stomach wall. it is released ...
  7. What is Small intestine?
    The small intestine or small bowel is an organ in the gastrointestinal tract where most of ...
  8. What is Pancreas?
    The pancreas is an organ of the digestive system and endocrine system of vertebrates. in humans, ...
  9. What is Bile?
    Bile is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, ...
  10. What is Gall bladder?
    Gallbladder is a small hollow organ where bile is stored and concentrated before it is released ...
  11. What is Large intestine?
    The large intestine, also known as the large bowel, is the last part of the gastrointestinal ...
  12. What is Hepatic portal vein?
    The portal vein or hepatic portal vein is a blood vessel that carries blood from the ...
  13. What is Lacteal?
    A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small ...
  14. What is Large intestine?
    The large intestine, also known as the large bowel, is the last part of the gastrointestinal ...
  15. What is Appendix?
    The appendix is a small, pouch-like sac of tissue that is located in the first part ...
  16. What are Feces?
    Feces are the solid or semisolid remains of the food that could not be digested in ...
  17. What is Rectum?
    The rectum is the final straight portion of the large intestine in humans and some other ...
  18. What is Dentition?
    Dentition pertains to the development of teeth and their arrangement in the mouth. in particular, it ...
  19. What is Coprophagy?
    Coprophagia is the consumption of feces. coprophagy refers to many kinds of feces-eating, including eating feces ...
  20. What is Ruminants?
    Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in ...
  21. What is Enteric division?
    The enteric nervous system (ens) or intrinsic nervous system is one of the main divisions of ...
  22. What is Diabetes Mellitus?
    Diabetes mellitus (dm), commonly known as diabetes, is a group of metabolic disorders characterized by high ...
  23. What is Type I diabetes?
    Type 1 diabetes, which usually appears during childhood, destroys the person's ability to produce insulin. treatment ...
  24. What is Type II diabetes?
    Type 2 diabetes (t2d), also known as adult-onset diabetes, is a form of diabetes that is ...
  25. What is Over nourishment?
    Overnutrition or hyperalimentation is a form of malnutrition in which the intake of nutrients is oversupplied. ...
  26. What is Heart?
    The heart is a muscular organ in most animals, which pumps blood through the blood vessels ...
  27. What is Hemolymph?
    Hemolymph, or hemolymph, is a fluid, analogous to the blood in vertebrates, that circulates in the ...
  28. What is Closed circulatory system?
    The closed circulatory system, also called the cardiovascular system or the vascular system, is an organ ...
  29. What is Cardiovascular system?
    The closed circulatory system, also called the cardiovascular system or the vascular system, is an organ ...
  30. What are Arteries?
    An artery (plural arteries) is a blood vessel that takes blood away from the heart to ...
  31. What are Arterioles?
    An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from ...
  32. What are Capillaries?
    A capillary is a small blood vessel from 5 to 10 micrometers (µm) in diameter, and ...
  33. What are Capillary beds?
    Individual capillaries are part of the capillary bed, an interweaving network of capillaries supplying tissues and ...
  34. What is Atria?
    The atrium is the upper chamber through which blood enters the heart. there are two atria ...
  35. What is Ventricles?
    A ventricle is one of two large chambers toward the bottom of the heart that collect ...
  36. What is Single circulation?
    Single circulation is the type of circulatory system that occurs in fishes, in which the blood ...
  37. What is Double circulation?
    In animals with double circulation, the pumps for the two circuits are combined into a single ...
  38. What is Pulmonary circuit?
    The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from ...
  39. What is Pulmocutaneous circuit?
    Pulmocutaneous circulation is part of the amphibian circulatory system. it is responsible for directing blood to ...
  40. What is Cardiac cycle?
    The cardiac cycle is the performance of the human heart from the beginning of one heartbeat ...
  41. What is Systole?
    The systole is the part of the cardiac cycle during which some chambers of the heart ...
  42. What is Diastole?
    Diastole is the part of the cardiac cycle during which the heart refills with blood after ...
  43. What is Cardiac output?
    Cardiac output is a term used in cardiac physiology that describes the volume of blood being ...
  44. What is Heart rate?
    Heart rate is the speed of the heartbeat measured by the number of contractions (beats) of ...
  45. What is Stroke volume?
    In cardiovascular physiology, stroke volume (sv) is the volume of blood pumped from the left ventricle ...
  46. What is Atrioventricular valve?
    These are the mitral and tricuspid valves, which are situated between the atria and the ventricles ...
  47. What are Semilunar valves?
    The aortic and pulmonary valves are located at the base of the aorta and the pulmonary ...
  48. What is Heart murmur?
    Heart murmurs are heart sounds produced when blood flows across one of the heart valves that ...
  49. What is Sinoatrial mode?
    The sinoatrial node is a group of cells located in the wall of the right atrium ...
  50. What is Electrocardiogram?
    Electrocardiography is the process of producing an electrocardiogram of the electrical activity of the heart using ...
  51. What is Endothelium?
    Endothelium refers to cells that line the interior surface of blood vessels and lymphatic vessels, forming ...
  52. What is Systolic pressure?
    Blood pressure is usually expressed in terms of the systolic pressure (maximum during one heartbeat) over ...
  53. What is Pulse?
    A pulse represents the tactile arterial palpation of the heartbeat by trained fingertips. the pulse may ...
  54. What is Vasoconstriction?
    Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of ...
  55. What is Vasodilation?
    Vasodilation is the widening of blood vessels and it typically is a result of relaxation of ...
  56. What is Lymph node?
    A lymph node or lymph gland is an ovoid or kidney-shaped organ of the lymphatic system ...
  57. What is Plasma?
    Blood plasma is a yellowish liquid component of blood that normally holds the blood cells in ...
  58. What are Platelets?
    Platelets, also called thrombocytes and they are a component of blood that function along with the ...
  59. What are Erythrocytes?
    Erythrocytes are red blood cells that are the most common type of blood cell and the ...
  60. What is Hemoglobin?
    Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells (erythrocytes) of almost all vertebrates. ...