Download Investigation 1 “Living Cells”

Investigation 1 “Living Cells”
1. Cell: the basic unit of life.
2. Oxygen: an atmospheric gas needed by most living cells.
3. Carbon Dioxide: a waste gas product by living cells.
4. Heart: a muscular organ that contracts rhythmically,
producing a pulse with each contraction.
a. The human heart has four chambers: the right atrium,
right ventricle, left atrium, and left ventricle.
5. Blood: a liquid tissue that flows to and from cells in blood
vessels called arteries, veins, and capillaries.
6. Circulatory System: includes tissues (blood and blood
vessels) and organs (heart) that transport life-support
substances to cells and remove waste.
7. Respiratory System: includes the tissues and organs
(lungs) that provide gas exchange between the blood and
atmosphere.
8. Digestive System: disassembles food into nutrients that
cells can use.
9. Mouth and Teeth moisten and crush food before it moves
through the esophagus to the stomach.
5th Grade
Living Systems
Investigation 1
10. Intestines: Digestive juices, added to the food in the
stomach, or small intestine, and the large intestine helps
release nutrients into the bloodstream.
11. Colon: compacts and dehydrates food waste.
12. Kidney: filters waste from the blood and turns it into
urine, which is stored in the bladder.
5th Grade
Living Systems
Investigation 1