Question

10. Use the key to identity each tooth area described below. Review Sheet 38 87 Key: a cement 1. visible portion of the tooth in situ 2. material covering the tooth root b. crown c. dentin 3. hardest substance in the body d enamel 4. attaches the tooth to the tooth socket e. gingival sulcus 5. portion of the tooth embedded in bone £ odontoblast 6. forms the major portion of tooth structure similar to bone g. periodontal ligament 7. produces the dentin h. pulp 8. site of blood vessels, nerves, and lymphatics i. root 9. narrow gap between the crown and the gum 11. In the human, the number of deciduous teeth is the number of permanent teeth is 12. The dental formula for permanent teeth is 120 x 2 Explain what this means. deciduous teeth What is the dental formula for the deciduous teeth 13. Which teeth are the "wisdom teeth"? 14. Various types of alands form a part of the alimentary canal wall or duct their secretions into it. Match the glands listed in column B with the function/locations described in column A Column B Column A a. duodenal glands 1. produce(s) mucus; found in the submucosa of the small intestine b. gastric glands 2. produces) a product containing amylase that begins starch breakdown in the mouth c. intestinal crypts 3. produce(s) many enzymes and an alkaline fluid that is secreted into the duodenum d. liver e. pancreas 4. produce(s) bile that it secretes into the duodenum via the bile duct salivary glands 5. produce(s) HCl and pepsinogen 6. found in the mucosa of the small intestine: produces intestinal juice Which of the salivary glands produces a secretion that is mainly serous? 16. What is the role of the gallbladder?

Answer 1

10.

1. Visible portion of tooth in situ -(b) crown

2.material covering tooth root- (a) cement

3. Hardest substance in the body-(d) enAmel

4. Attaches to the tooth and tooth socket -(g) periodontal ligament

5. Portion of tooth embedded in bone-(i) root

6. Forms major portion of tooth structure; similar to bone-(c)dentine

7. Produces dentin-(f)odontoblast

8.site of blood vessels, nerves and lymphatics-(h)pulp

9. Narrow gap between crown and gum-(e) gingival sulcus

11. Deciduous teeth-20; permanent teeth-32

12.In each set, incisors (I) are indicated first, canines (C) second, premolars (P) third, and finally molars (M), giving I:C:P:M. So for example, the formula 2.1.2.3 for upper teeth indicates 2 incisors, 1 canine, 2 premolars, and 3 molars on one side of the upper mouth.

The deciduous dental formula is notated in lowercase lettering preceded by the letter d: e.g. di:dc:dm.An animal's dentition for either deciduous or permanent teeth can thus be expressed as a dental formula, written in the form of a fraction: I.C.P.M / I.C.P.M.

Since the teeth are always listed in the same order, the letters can be dropped, thus:

Human: deciduous teeth: 212/212; adult = 2123/2123. Both childhood molars are replaced by adult premolars. Adult total is double the formula = 32.

13.Impacted wisdom teeth are third molars at the back of the mouth that don't have enough room to emerge or develop normally. Wisdom teeth are the last adult teeth to come into the mouth (erupt). Most people have four wisdom teeth at the back of the mouth — two on the top, two on the bottom.

14.

1. --(a)

2.--(f)

3.--(e)

4.--(d)

5.--(b)

6.--(c)

15.parotid glands:parotid glands produce a serous, watery secretion

16 .The gallbladder is a pear-shaped, hollow structure located under the liver and on the right side of the abdomen. Its primary function is to store and concentrate bile, a yellow-brown digestive enzyme produced by the liver. The gallbladder is part of the biliary tract.

The gallbladder serves as a reservoir for bile while it’s not being used for digestion. The gallbladder's absorbent lining concentrates the stored bile. When food enters the small intestine, a hormone called cholecystokinin is released, signaling the gallbladder to contract and secrete bile into the small intestine through the common bile duct.

The bile helps the digestive process by breaking up fats. It also drains waste products from the liver into the duodenum, a part of the small intestine.