Question

1. which system covers the external surface of the body and protects deeper tissues: a. integumentary system b. skeletal system c. lymphatic system d. nervous system e. endocrine system 2. hematopoiesis, or blood cell formation, is a function of the: a. integumentary system b. respiratory system c. nervous system d. muscular system e. skeletal system 3. which of the following is the correct sequence, going from simplest to most complex, in the levels of structural organization of the human body: a. chemical level, cellular level, tissue level, organ level, organ system level, organismal level b. chemical level, tissue level, cellular level, organ system level, organ level, organismal level c. cellular level, tissue level, chemical level, organ level, organ system level, organismal level d. cellular level, chemical level, tissue level, organ system level, organismal level, organ level e. cellular level, chemical level, tissue level, organ level, organ system level, organismal level

Explanation:

1. The integumentary system consists of skin, hair, nails, and associated glands. It forms the body's outer - covering and protects deeper tissues.
2. Hematopoiesis occurs in the red bone marrow which is part of the skeletal system. Red bone marrow produces blood cells.
3. The levels of structural organization of the human body start with the chemical level (atoms and molecules), then cellular level (cells), tissue level (groups of similar cells), organ level (made of different tissues), organ - system level (groups of organs working together), and organismal level (the whole organism).

Answer:

1. a. integumentary system
2. e. skeletal system
3. a. chemical level, cellular level, tissue level, organ level, organ system level, organismal level