The skeletal system: Axial and appendicular
Axial system has 80 bones
Cranial bones
Face is formed by 14 bones called facial bones including the mandible
6 small bones in the ears
Vertebral has 26 bones (vertebrae: 5 sections: cervical, Thoracic, lumbar,
sacral,
Thorax: rib cage: sternum and 12 pair of ribs. The first 7 are called true
pairs because they are connected to the sternum and the next 3 are called
false ribs and last 2 ribs are called floating ribs.
126 bones
Points of 2 bones meet are called joints
immovable joints
Partially movable joins
freely movable joints
There are over 600 skeletal muscles (also called voluntary muscles). They
work in pairs. Muscle tissues can only contract. They can pull but cannot
push.
A tendon: tough band of fibrous tissues that connects muscles to bone
Ligaments joins one bone to another
Two types of bone tissue
long bone
Periosteum
medullary cavity: contains bone marrow
Ossification:
Axial system has 80 bones
Cranial bones
Face is formed by 14 bones called facial bones including the mandible
6 small bones in the ears
Vertebral has 26 bones (vertebrae: 5 sections: cervical, Thoracic, lumbar,
sacral,
Thorax: rib cage: sternum and 12 pair of ribs. The first 7 are called true
pairs because they are connected to the sternum and the next 3 are called
false ribs and last 2 ribs are called floating ribs.
126 bones
Points of 2 bones meet are called joints
immovable joints
Partially movable joins
freely movable joints
There are over 600 skeletal muscles (also called voluntary muscles). They
work in pairs. Muscle tissues can only contract. They can pull but cannot
push.
A tendon: tough band of fibrous tissues that connects muscles to bone
Ligaments joins one bone to another
Two types of bone tissue
long bone
Periosteum
medullary cavity: contains bone marrow
Ossification:
