level of body organization and human body as a system

Heart - The efficiency of the heart decreases with increasing age. In a 70 year old man, the heart pumps only 65% blood per minute as compared to a 30 year old man. Oxygen uptake by blood - Oxygen uptake is reduced with advance in age. Decrease of blood volume - The production of RBC from t..

Functions - The nervous system carries out the following functions i) It perceives the changes around us through our senses. ii) It controls and coordinates all the activities of the muscles in response to the changes outside. iii) It also maintains the internal environment of the bo..

The closed circulatory system can be represented as follows. Diagram showing inter-relationship between artery, vein and capillary The closed blood vascular system is a very well developed system This is so because, a) The organisms have a thick body..

) Antibodies consist of heavy and light chains and variable and constant portions. 11) Acquired immunity is of 2 types namely Active and passive immunity. 12) Cellular immunity refers to destruction of antigens by T-cells and humoral immunity refers to destruction of antigens by antibodies 13) T-ce..

The nervous system carries out the following functions: It perceives the changes around us through our senses. It controls and coordinates all the activities of the muscles in response to the changes outside. It also maintains the internal environment of the body by coordinating..

Many organ systems in coordination with one another form the organismic (or individual) level. A frog, for example, has various organ systems in its body like the integumentary system, digestive system, respiratory ..

Nervous Control in Human Beings - Nervous System - The nervous system carries out the following functions: It perceives the changes around us through our senses It controls and coordinates all the activities of the muscles in response to the changes outside It also mai..

Introduction - Health is considered to be the state of perfect functioning of body and mind, unhindered by diseases. Disease is the malfunctioning of the organism or part of it due to infection, inherent weakness or environmental stress, that upsets the normal physiological func..

Organ Transplantation - Organ transplantation has become a therapeutic modality to treat patients with end - stage disease. While many types of organs have been successfully transplanted, the histocompatibility barrier between recipient and donor remains a problem. It ..