What is the primary function of the cardiac skeleton in human hearts?
Why River Otters Have Bones… In Their Hearts

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Science, Health Sciences, Biology
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11th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To produce red blood cells
To store calcium deposits
To anchor soft parts of the heart and direct electrical signals
To pump blood throughout the body
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is endochondral ossification?
The breakdown of bone tissue
The hardening of arteries
The process of bone formation from cartilage
The formation of cartilage from bone
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might river otters develop heart bones?
To improve their breathing efficiency
To help them dive deeper
To support their large hearts during constant swimming
To increase their buoyancy
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do river otters' heart sizes compare to their body weight?
Their hearts are nearly a full percent of their body weight
Their hearts are about 6/10 of a percent of their body weight
Their hearts are the same size as human hearts
Their hearts are smaller than most mammals
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a potential reason for the random placement of heart bones in otters?
It indicates a genetic mutation
It is a result of their diet
It suggests a response to stress over time
It shows a lack of calcium in their diet
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