In humans red blood cells are primarily produced in the red marrow. to which body system does red marrow belong? a. integumentary system b. circulatory system c. muscular system d. skeletal system

Option D

Explanation:

Bone marrow is an integral part of bones and hence it is a part of skeletal system. It is of two types – a) Red bone marrow and b) yellow bone marrow

a)Red bone marrow which is responsible for producing red and white blood cells

b)Yellow bone marrow which is also responsible for producing white blood cells  

The red marrows are mainly found in bones like  

a)Breast bone

b)Rib bones

c)Skull bones

d)Hip bone  

e)At the femur and humerus ends of long bones  

Hence, option D is correct

its been noted for the past decade or so that there is some (approximately 5% to 7%) shrinkage in the brains of people who have schizophrenia, most notably in the gray matter, which is an important part structures in the brain’s amygdala, hippocampus and parahippocampus, which are all involved in memory storage and retrieval memory storage and retrieval.

explanation:

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answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: