Hands On Lab 6: Articulations Grading: Divide number incorrect by total number o

Question

Hands On Lab 6: Articulations Grading: Divide number incorrect by total number of questions (38) Preparation: Read exercise 10 in your lab book (p. 137-149) Activity 1: Fibrous Joints Gently feel your skull and move your scalp. If you have a young child, do the same to them. 1. Can you feel any of the sutures in your own skull? Iif so, which ones? 2. In the child, can you feel any of the soft spots (fontanels) or sutures? If so which ones? (If you do not have children, what would you expect to feel and where?) Reach into your mouth and gently feel your teeth. 3. Do any of them shift slightly? 4. What type of joint is found in teeth and what connects the tooth to the jaw bones? Wrap one hand around your forearm as shown and twist your arm back and forth. 5. Can you feel the connection between the radius and ulna? 6. What type of joint is this? 7. Can you move the radius and ulna separately from each other? 8. What other 2 bones in the body are connected by this type of joint?

Explanation / Answer

1. No I didn't feel any of the sutures in my own skull. However, in a small number of individuals, persistent metopic suture, also known as an incompletely fused frontal bone can be felt.

2.  The frontal or metopic suture is present in infants and closes in the first years of life.

3. Yes, teeth can move slightly.

4. Gomphosis joint is found in teeth. A fibrous ligament called the periodontal ligament connects the tooth to the jaw bones.

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