It is released through nitrogen - fixing bacteria
The pectoral girdle articulates with the axial skeleton only at the Sternoclavicular ligament<span>. The pectoral girdle connects the upper limbs to the axial skeleton and serves as the attachment site for the muscles of the upper back, chest and neck. The clavicle is the only long bone that lies in a horizontal position in the body. it has three regions; the medial end, the lateral end, and the shaft. The medial end has a triangular shape and articulates with the manubrium portion of the sternum. This forms sternoclavicular joint, which is the only bony articulation between the pectoral girdle of the upper limb and the axial skeleton. </span>
The 4th one. Maintaining body temperature and cooling down
In order to create energy from oxygen, the cells must undergo a process called cellular respiration which occurs in the mitochondria. The mitochondrion will use the oxygen, along with glucose, to create carbon dioxide, water, and energy.
