Skip to main content

THE HUMAN RIBS


A Rib from the middle of the series should be taken in order to study the common characters of the ribs.
Each rib presents two extremities, a posterior or vertebral, an anterior or ster­nal, and an intervening portion-the body or shaft.The posterior or vertebral extremity presents for examination a head, neck, and tuberosity. The head is marked by a kidney-shaped articular sur­face, divided by. a horizontal ridge into two facets for articulation with the costal cavity formed by the junction of the bodies of two contiguous dorsal vertebrse ; the upper facet i- small, the inferior one of larger size; the ridge separating them serves for the attachment of the interarticular ligament. The neck is that flat­tened portion of the rib which extends outward from the head; it is about an inch long, and is p aced in front of the transverse process of the lower of the two vertebrte with 'hieh the head articulates. Its anterior surface is flat and smooth, its posterior roueh f r the attachment of the middle costo-transverse ligament, and perforated b.' n merous foramina, the direction of which is less constant than those foun 1 on the inner surface of the shaft. Of its two borders the superior presents a rouzh ( - f r the attachment of the anterior costo-transverse ligament; its inferior b rd r '.; r unded. On the posterior surface of the neck, just where it joins the shaf an I rer the lower than the upper border, is an eminence-s-the tuberosity, or bere it consists of an articular and a non-articular portion.

Comments

Post a Comment

Popular posts from this blog

Malyn Clinic 1,200-Calorie, Low-Carb Diet Meal Plan July 2017.Easy Weight Loss

Note:Please read deeply till END. This plan is also good for Diabetic and Heart patients,Plan is tested on many peoples results were awesome.. Download Full plan in PDF file From Below L inks.   We hop you will share this D iet  on your f.b timeline to help your Friends and Family.  To get Daily Updates Please Like and Follow Our Facebook page ,go on this link ( Health TIPS Forever )  Note:Please read deeply till END. This plan is also good for Diabetic and Heart patients,Plan is tested on many peoples results were awesome..Download Full plan in PDF file From Below Links. We hop you will share this Diet on your f.b timeline to help your Friends and Family.  To get Daily Updates Please Like and Follow Our Facebook page ,go on this link (Health TIPS Forever)  Maximize your weight loss by following a low-calorie, low-carbohydrate meal plan. Set at 1,200 calories and under 25 grams of carbs per meal, this plan is considered very low-calorie and moder...
2 comments
Read more

The Fifth Nerve

The Fifth or Trifacial Nerve (n. trigeminus) is the largest cranial nerve. It resembles a spinal nerve (1) in arising by two roots; (2) in having a ganglion developed on its posterior root; and (3) in its function, since it is a compound nerve. It is the great sensory nerve of the head and face and the motor nerve of the muscles of mastication. Its upper two divisions are entirely sensory; the third division is partly sen.sory and partly motor. It arises by two roots: of these the anterior is the smaller, and is the motor root; the posterior, the larger and sensory. Its superficial origin is from the side of the pons Varolii, nearer to the upper than the lower border. The smaller root consists of three or four bundles; the larger root consists of numerous bundles of fibres, varying in number from,seventy to a hundred. The two roots are separated from one another by a few of the transverse fibres of the pons. 'I'he deep origin of the larger or sensory root is chiefly from a ...
1 comment
Read more

THE POPLITEAL ARTERY

THE ANASTOMOTICA accompanies the long saphenous nerve to the inner side of the thigh. It passes between the Sartorius and Gracilis muscles, and, piercing the fascia lata, is distrib¬uted to the integument of the upper and inner part of the leg, anastomosing with the inferior internal articular. The deep branch descends in the substance of the Vastus internus, lying in front of the tendon of the Adductor magnus, to the inner side of the knee, where it anastomoses with the superior internal articular artery and anterior recurrent branch of the anterior tibial. A branch from this vessel crosses outward above the articular surface of the femur, forming an anastomotic arch with the superior external articular artery, and supplies branches to the knee-joint. Popliteal Artery. The popliteal artery commences at the termination of the femoral at the opening in the Adductor magnus, and, passing obliquely downward and outward behind the knee-joint to the lower border of the Pop...
Post a Comment
Read more