6.2: Anatomy & Physiology: Skeletal Systems 🩻 Flashcards
How many bones are there in the human body?
206.
Ligaments
Connect bone to bone.
Tendons
Connect bone to muscle.
Cartilage
Connective tissue that allows smooth movement of joints.
Axial Skeleton
- Skull
- Spinal Column
- Ribcage
Skull: Frontal Bone
The forehead.
Skull: Parietal Bone
Top of the head, between the frontal and occipital bone.
Skull: Occipital Bone
The back portion of the skull.
Skull: Temporal Bone
Lateral bones, above the cheekbones.
Skull: Maxillae (max-sill-ee)
Forms the upper jaw, above the upper teeth.
Skull: Mandible
The movable portion of the lower jaw.
Skull: Zygomatic Bone
Cheekbones.
Skull: Nasal Bone
The nose.
Skull: Foramen Magnum
Opening in the occipital bone where the brain connects to the spinal cord.
Spinal Column
The central supporting structure that protects the spinal cord.
How many total vertebrae in the spinal column?
33 vertebrae.
Spinal Column: Cervical Spine
7 vertebrae, C1-C7.
Spinal Column: Thoracic Spine:
12 vertebrae, T1-T12.
Spinal Column: Lumbar Spine
5 vertebrae, L1-L5.
Spinal Column: Coccyx (kaak-sicks)
4 fused vertebrae
Spinal Column: Sacrum
5 fused vertebrae
Thoracic Cavity
Houses the:
- Heart
- Lungs
- Trachea
- Esophagus
- Great Vessels
Sternum
Breastbone
3 Parts of the Sternum
- Manubrium: Upper portion
- Body: Middle portion
- Xiphoid: Lower tip portion
Appendicular Skeleton
Includes the bones of the:
- Arms
- Legs
- Pelvis
Shoulder Girdle
Formed by the:
- Clavical (collarbone)
- Scapula (shoulder blade)
- Humerus (upper arm)
Arm: Humerus
Upper Arm.
Arm: Radius
The lateral bone of the forearm.
Arm: Ulna
The medial bone of the forearm
Arm: Carpal Bones
The wrist
Arm: Metacarpals
The base of the fingers
Arm: Phalanges
The fingers
Pelvis
A ring-shaped structure formed by three bones that support the spinal column and protect the abdominal organs.
Pelvis: Illium
The upper portion of the pelvis.
Pelvis: Ischium
The lower portion of the pelvis.
Pelvis: Pubis
The anterior portion of the pelvis.
Leg: Femur
The thigh bone (the strongest bone in the body).
Leg: Patella
The kneecap
Leg: Tibia
The medial bone of the lower leg. (The shinbone)
Leg: Fibula
The lateral bone of the lower leg.
Leg: Tarsal Bones
Ankles.
Leg: Metatarsal Bones
The base of the toes.
Leg: Phalanges
The toes.
Joints
Where two bones come together.
Joints: Symphysis
A joint with limited motion.
Joints: Ball-and-Socket
A joint where the distal end is capable of free motion, such as the shoulder.
Joints: Hinge Joints
A joint where the bones can only move uniaxially, such as the knee.
The three types of muscles
- Involuntary Muscles
- Digestive Tract
- Voluntary Muscles (Skeletal)
Involuntary Muscles
Muscles located within the blood vessels
Voluntary Muscles
Muscles that attach to the skeleton.