Unit 4: Bones And Teeth Flashcards
What does teeth do to help
Gives the food a larger surface area upon which enzymes can work. It also makes the food easier to swallow.
What are teeth for
Teeth are used to bite off pieces of food. They chop, crunch, grind the food in smaller pieces.
Which bit is the enamel
The top bit that shows. This is the hart part of the tooth for bitching and chewing. Protects in dentine.
What is the dentine
The living part of the tooth- produces the enamel.
What are the blood vessels
Supplies the tooth with nutrients. The bit inside the tooth with the nerves
What is the pulp cavity
Contains the blood vessels and nerves. Bit at the top next to the nerves right in the middle of the tooth.
What is the cement
Covers the dentine and aids the attachment to the jaw. The bit on e side of the tooth, in the gum.
What is the gum?
Covers the jaw bone
What are the nerves
Helps us detect how hard we are biting. Inside the tooth.
What is the root
The part of the tooth below the gum
What is the crown
The top of the tooth. Which you can see.
What is the Incisor
Sharp chisel like edges to cut off the food.
What is the canine
Large and pointed for tearing food
What is the premolar
Flattened surfaces for crushing and girding food.
What is the molars
Flattened surfaces for crushing and grinding food.
What is a dog
A dog is a carnivore.,
What do carnivores teeth do
Teeth adapt for catching pray and eating meat. Must be able to hold pray. Teeth must also be able to slice.
What teeth help the dog hold onto pray
The canines
What is a sheep
A herbivore
What does a sheep’s teeth need
Main part of diet of sheep is tough grass that must be ground up before digestive.
What are liquid skeletons?
Worms have liquid skeletons. Liquid is trapped in spaces inside the body. The muscle squeezes against the liquid and keeps the firm. B squeezing against different parts of its body the worm can change its shape and move.
What are exoskeletons
This is where the skeletons on the outside. Hollow tubes form the limbs with gaps between them that form the joints. Many animals have these, belong to the phylum arthropods. The skeleton is often made of the substance called chitin.
What does the exoskeleton provide
Protection, but it can be very heavy. Has to be shed, as animal grows. Has no protection afterwards, until another one has grown. Body has no support.
What is endoskeleton
This is where the skeleton is inside the body. Usually made of bone and cartilage, rather than chitin. All vertebrates have endoskeleton and the backbone is made of small bones called vertebrae.
