What is the relation between and organism being poikilothermic or homeothermic and the mixing of oxygenated and deoxygenated blood?
Poikilothermic Animals:
1. Their body temperature varies with environmental temperature.
2. They are also called cold-blooded animals.
3. They get heat from the environment hence they are called ectothermal animals.
4. Hypothalamus does not act as thermoregulatory center in brain.
E.g. inverte-brates, Pisces, amphibians and reptiles.
Homeothermic Animals:
1. Body temperature remains constant.
2. They are also called warm-blooded animals.
3. They get heat from the body; hence they are called endothermic animals.
4. Hypothalamus acts as thermoregulatory center in brain.
E.g. Birds, mammals.
One common type of congenital abnormality is a simple septal defect, where a hole is found in the partition, or septum, between the right atriumand left atrium or between the right ventricle and left ventricle of the heart. The most common such defect is persistence of the foramen ovale, an opening in the atrial septum that is normal before birth and that should close at birth or shortly thereafter. A hole between the two sides of the heart produces an abnormal mixture of oxygenated blood from the pulmonary circulation and deoxygenated blood from the systemic circulation. It also causes a sort of short circuit to develop where more blood flows through the lungs than through the other organs of the body. Ultimately such a condition may cause thickening of the walls of the pulmonary artery as well as pulmonary hypertension (high blood pressure). Increased stress may be placed on the right ventricle as it tries to pump blood through the pulmonary circuits for oxygenation. Right heart failure may then develop, and the supply of appropriately oxygenated blood to the body tissues may become compromised. Defects of the atrium and ventricle can be repaired surgically with ease and great success as long as severe, irreversible pulmonary hypertension has not developed.
Poikilothermic Animals:
1. Their body temperature varies with environmental temperature.
2. They are also called cold-blooded animals.
3. They get heat from the environment hence they are called ectothermal animals.
4. Hypothalamus does not act as thermoregulatory center in brain.
E.g. inverte-brates, Pisces, amphibians and reptiles.
Homeothermic Animals:
1. Body temperature remains constant.
2. They are also called warm-blooded animals.
3. They get heat from the body; hence they are called endothermic animals.
4. Hypothalamus acts as thermoregulatory center in brain.
E.g. Birds, mammals.
One common type of congenital abnormality is a simple septal defect, where a hole is found in the partition, or septum, between the right atriumand left atrium or between the right ventricle and left ventricle of the heart. The most common such defect is persistence of the foramen ovale, an opening in the atrial septum that is normal before birth and that should close at birth or shortly thereafter. A hole between the two sides of the heart produces an abnormal mixture of oxygenated blood from the pulmonary circulation and deoxygenated blood from the systemic circulation. It also causes a sort of short circuit to develop where more blood flows through the lungs than through the other organs of the body. Ultimately such a condition may cause thickening of the walls of the pulmonary artery as well as pulmonary hypertension (high blood pressure). Increased stress may be placed on the right ventricle as it tries to pump blood through the pulmonary circuits for oxygenation. Right heart failure may then develop, and the supply of appropriately oxygenated blood to the body tissues may become compromised. Defects of the atrium and ventricle can be repaired surgically with ease and great success as long as severe, irreversible pulmonary hypertension has not developed.
