Anatomy of the Shoulder

The two main bones of the shoulder are the humerus and the scapula (shoulder blade).

The joint cavity is cushioned by articular cartilage covering the head of the humerus and face of the glenoid. The scapula extends up and around the shoulder joint at the rear to form a roof called the acromion, and around the shoulder joint at the front to form the coracoid process. Ligaments connect the bones of the shoulder, and tendons join the bones to surrounding muscles. The bicepstendon attaches the biceps muscle to the shoulder and helps to stabilize the joint.The end of the scapula, called the glenoid, meets the head of the humerus to form a glenohumeral cavity that acts as a flexible ball-and-socket joint.The joint is stabilized by a ring of fibrous cartilage surrounding the glenoid called the labrum.

Ligaments connect the bones of the shoulder, and tendons join the bones to surrounding muscles. The biceps tendon attaches the biceps muscle to the shoulder and helps to stabilize the joint.The end of the scapula, called the glenoid, meets the head of the humerus to form a glenohumeral cavity that acts as a flexible ball-and-socket joint.The joint is stabilized by a ring of fibrous cartilage surrounding the glenoid called the labrum.

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Human anatomy nose

The visible part of the human nose is the protruding part of the face that bears the nostrils.
 The shape of the nose is determined by the ethmoid bone and the nasal septum,
which consists mostly of cartilage and which separates the nostrils.
 On average the nose of a male is larger than that of a female.
The nasal root is the top of the nose, forming an indentation at the suture where the nasal bones meet the frontal bon.

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Respiratory system

The respiratory system is the anatomical system of an organism that introduces respiratory gases to the interior and performs gas exchange.

 In humans and other mammals, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles.

 Molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous external environment and the blood.

Other animals, such as insects, have respiratory systems with very simple anatomical features, and in amphibians even the skin plays a vital role in gas exchange.

 Plants also have respiratory systems but the directionality of gas exchange can be opposite to that in animals.

The respiratory system in plants also includes anatomical features such as holes on the undersides of leaves known as stomata.

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The human brain is the center of the human nervous system.

The human brain is the center of the human nervous system.

It has the same structure as the brains of other mammals,

but is larger than expected on the basis of body size among other primates.

Estimates for the number of neuronsin the human brain range from 80 to 120 billion.

Most of the expansion comes from the cerebral cortex.

Fig: CNS

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Human anatomy

The human brain is the center of the human nervous system.

It has the same structure as the brains of other mammals,

but is larger than expected on the basis of body size among other primates.

Estimates for the number of neuronsin the human brain range from 80 to 120 billion.

Most of the expansion comes from the cerebral cortex, especially the frontal lobes,

which are associated with executive functions such as self-control, planning, reasoning, and abstract thought.

The portion of the cerebral cortex devoted to vision is also greatly enlarged in human beings,

and several cortical areas play specific roles in language,

a skill that is unique to humans.

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