glenoid cavity: pectoral girdle:: ______________: pelvic girdle
Answers
Answer:
The shoulder girdle or pectoral girdle is the set of bones in the appendicular skeleton which connects to the arm on each side. In humans it consists of the clavicle and scapula; in those species with three bones in the shoulder, it consists of the clavicle, scapula, and coracoid. Some mammalian species (such as the dog and the horse) have only the scapula.
The pectoral girdles are to the upper limbs as the pelvic girdle is to the lower limbs; the girdles are the parts of the appendicular skeleton that anchor the appendages to the axial skeleton.
In humans, the only true anatomical joints between the shoulder girdle and the axial skeleton are the sternoclavicular joints on each side. No anatomical joint exists between each scapula and the rib cage; instead the muscular connection or physiological joint between the two permits great mobility of the shoulder girdle compared to the compact pelvic girdle; because the upper limb is not usually involved in weight bearing, its stability has been sacrificed in exchange for greater mobility. In those species having only the scapula, no joint exists between the forelimb and the thorax, the only attachment being muscular.
glenoid cavity
[ˈɡliːnɔɪd]
NOUN
anatomy
a shallow depression on a bone into which another bone fits to form a joint, especially that on the scapula into which the head of the humerus fits.
The pelvic girdle is a ring-like bony structure, located in the lower part of the trunk. It connects the axial skeleton to the lower limbs.
In this article, we shall look at the anatomy of the pelvic girdle – its bony landmarks, functions, and its clinical relevance.
Structure of the Pelvic Girdle
The bony pelvis consists of the two hip bones (also known as innominate or pelvic bones), the sacrum and the coccyx.
There are four articulations within the pelvis:
Sacroiliac joints (x2) – between the ilium of the hip bones, and the sacrum
Sacrococcygeal symphysis – between the sacrum and the coccyx.
Pubic symphysis – between the pubis bodies of the two hip bones.
Ligaments attach the lateral border of the sacrum to various bony landmarks on the bony pelvis to aid stability.
The pelvic girdle is formed by the hip bones, sacrum and coccyx.
Functions of the Pelvis
The strong and rigid pelvis is adapted to serve a number of roles in the human body. The main functions being:
Transfer of weight from the upper axial skeleton to the lower appendicular components of the skeleton, especially during movement.
Provides attachment for a number of muscles and ligaments used in locomotion.
Contains and protects the abdominopelvic and pelvic viscera
Explanation:
Pectoral Girdle,