Blood consists of many different types of cells. These cells work together to keep a person's blood healthy. Which of the following BEST classifies blood?
A.
organ
B.
tissue
C.
organism
D.
organ system
B. tissue
The graph below shows how the respiratory system changes as a person goes from resting to running to walking to resting again. The respiration rate is the number of breaths a person takes per minute.
Based on the graph, which of the following is a function of the respiratory system?
A.
to deliver oxygen to cells for cellular respiration at different rates so that different amounts of energy can be made when needed
B.
to detect changes in the outside world through nerve impulses and send these impulses throughout the body
C.
to increase the breathing rate during heavy activity so that more carbon dioxide can be absorbed by respiratory cells
D.
to decrease a person's heartbeat during heavy activity and decrease the flow of blood to areas that will pool with blood
The best classification for blood is B. tissue.
To determine the correct answer, let's first examine the different options and their definitions:
A. An organ is a group of tissues that work together to perform a specific function.
B. Tissue is a group of cells with similar structure and function that work together to perform a specific function.
C. An organism is an individual living being that carries out various life processes.
D. An organ system is a group of organs that work together to perform a specific function in the body.
Now, looking specifically at blood, we can see that it is not just a single organ, nor is it an entire organism or an organ system. Instead, blood is a mixture of cells that work together to maintain overall body health. These blood cells include red blood cells, white blood cells, and platelets, among others.
Considering this information, the best classification for blood is B. tissue since it is a group of cells with similar structure and function that work together to perform a specific function.