Read the summary and the most important questions on bio unit 5

• 1 title page p6

• what is this chapter about and explain the title support and locomotion.

  this unit is about how you body is supported and how you are able to move.

• 2 subunit 1 the human skeleton p8/9

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• which animals do have a endoskeleton?

  vertebrate animals like such as fish, amphibians, reptiles, birds and mammels.

• what are the mainparts of the human skeleton?

  skull, backbone, the two girdles pectoral girdle and pelvic girdle, rib cage, limbs.

• what is a pelvic and pecotral girdle?

  plevic girdle= pelvis girdle(heup)

  pectoral girdle= shoulder girdle.

• what are the 4 functions of an skeleton??

  1. to support your body (without skeleton you would simply collapse.)

  2. to protect some organs (rib cage protect the lungs and heart/the spinal cord by the vertebrae/ barin by your bony plates.)

  3.to make movement possible. (most bones are in such a way that they allow movement)

  4. it gives your body its shape.

• 3 subunit 3 bone and cartilage p 10/11

• what do bone and cartilage have in commen and what are their differences?

  differences:

  1. extracellular material in bone tissue is much tougher than that of cartilage tissue.

  2. an cartilage tissue is composed of cells clustered inside the extracellular material. this material is constructed in such a way that it is strong and flexible. and an bone tissue is composed of cells surrounding tiny canals. this canals contain blood vessels.

  have in commen:

  1.your body is supported by this to types of tissue.

  2.but tissues contain extracellular material between the cells.

• what happens if you soak a dead bone in hydrochloric acid?

  you can bend the bone. conclusion calcium makes the bone hard.

• what happens if you burn a dead bone?

  when you burn it the collagen go out the bone. and you can break the bone conclusion collagen makes the bone flexible.

• how do bones change when we grow older?

  as we grow older, collagen in the extracellular material is replaced by calcium phosphate i you bones.

• 4 subunit 4 joints p 12/13/14

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• what is a jont in the skeleton?

  a place where two bones meet.joints make movement possible.