the skeletal system. the appendicular skeleton limbs (appendages) pectoral girdle pelvic girdle
DESCRIPTION
The Pectoral (Shoulder) Girdle Composed of two bones Clavicle – collarbone (articulates with the manubrium) Scapula – shoulder blade Where each upper limb articulates with the trunk These bones allow the upper limb to have free movementTRANSCRIPT
The Skeletal The Skeletal SystemSystem
The Appendicular Skeleton
Limbs (appendages)
Pectoral girdle
Pelvic girdle
The Pectoral (Shoulder) Girdle
Composed of two bones Clavicle – collarbone (articulates with the
manubrium) Scapula – shoulder blade
Where each upper limb articulates with the trunk
These bones allow the upper limb to have free movement
Bones of the Shoulder Girdle
Figure 5.20a–b
Scapula
Figure 6-22
Bones of the arm
The upper arm is formed by a single bone Humerus: extends
from the scapula to the elbow
Proximal
Distal
Bones of the arm
The forearm has two bones Ulna: lies on the
medial (pinky) side Radius: lies on the
lateral (thumb) side
Figure 5.21c
Bones of the arm The hand – composed
of 27 bones Carpals (8)– wrist Metacarpals – palm Phalanges – fingers
Proximal Middle Distal
Pollex – thumb (only has proximal and distal
Figure 5.22
Bones of the Pelvic Girdle Hip bones Composed of three pair of fused
bones Ilium Ischium Pubic bone
The total weight of the upper body rests on the pelvis
Protects several organs Reproductive organs Urinary bladder Part of the large intestine
Pelvis
Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings Figure 6-26(a)
Male VS. Female
Bones of the Leg
The thigh has one bone Femur – thigh bone Longest, heaviest,
strongest bone Distally articulates
with the tibia at the knee
Bones of the Leg
The leg has two bones Tibia: Large medial
bone (shin bone) Fibula: slender, does
not participate in joint movement. Stabilizes the ankle
Figure 5.24c
Bones of the Lower Limbs The foot
Tarsus (7) – ankle Metatarsals – sole Phalanges – toes
Proximal Middle Distal
Calcaneus – heel Hallux – big toe
Proximal Distal
Figure 6-30(b)