BLM 1-26 Topic 1.3 Review (Alternative Format)
1. All cells start their life as stem cells. Stem cells are all the same. Each stem cell can
specialize to become a [nerve, muscle, skin, blood, bone] cell, a [nerve, muscle,
skin, blood, bone] cell, or any other type of specialized cell. Multi-celled organisms
need these specialized cells to survive.
2. Answers should be two of the following: Brain: controls all body activities. Heart:
pumps blood through body. Liver: cleans blood, stores vitamins and other substances.
Kidneys: produce urine, filter waste and excess water from blood. Lungs: draw
oxygen into body and release carbon dioxide. Stomach: digests food.
3. Drawings should resemble photographs in question 4 on page 55 of the student
textbook.
a) enables body parts to move, exert force, or change shape
b) senses, conducts, and transmits information
c) supports cells and tissues, stores minerals, and makes blood cells
d) tissue covers and protects internal body surfaces, helps control body temperature
4.
5.
6. Answers may vary. Students should choose one of the organ systems illustrated on
page 47 of the student textbook and write three jobs that it does in the body.
7. C
DATE:
UNIT 1
NAME:
CLASS:
Unit 1 BLM Answers
BLM 1-47
(continued)
BLM 1-36 Topic 1.4 Review (Alternative Format)
1. a) The respiratory system carries oxygen to the blood and removes carbon dioxide
from the blood.
b) The digestive system breaks down food, absorbs nutrients, and eliminates solid
waste.
c) The circulatory system transports dissolved gases and nutrients to cells in the
body.
d) The muscular system moves the diaphragm so that we breathe.
2. a) The digestive system and the circulatory system supply nutrients to body cells.
b) The circulatory system and the respiratory system provide oxygen to body cells
and remove carbon dioxide from body cells.
3. a) Carbon-dioxide-rich blood enters the heart through the upper-right chamber. It
flows to the lower-right chamber.
b) The heart pumps the carbon-dioxide-rich blood to the lungs. In the lungs the
blood gets rid of carbon dioxide and picks up oxygen.
c) The blood travels to the upper-left chamber of the heart. It flows to the lower-left
chamber.
d) The heart pumps the blood through the arteries. The blood travels in the
capillaries and the veins back to the heart.
4. Drawings should resemble Figure 1.20 on page 59 of the student textbook.
5. a) Nutrients pass from the digestive system to the circulatory system in the small
intestine.
b) Nutrients are absorbed from the digestive system into the circulatory system.
6. a) Red blood cells carry oxygen to the body.
b) The body uses oxygen to obtain energy through cellular respiration to move
and do work.
c) A person who is anemic might be tired because he or she does not have enough
red blood cells to get enough oxygen to body cells.