Question

multiple choice
identify the choice that best completes the statement or answers the 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

1. 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

1. 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.

Explanation:

1. The integumentary system, which includes skin, hair, nails etc., covers the external surface of the body and protects deeper tissues.
2. Hematopoiesis occurs in the red - bone marrow which is part of the skeletal system.
3. The levels of structural organization of the human body from simplest to most complex are: chemical level (atoms and molecules), cellular level (cells), tissue level (groups of similar cells), organ level (organs 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