What passes through the nutrient foramen?
The nutrient canal(foramen)is directed away from the growing end of bone. The growing ends of bones in upper limb are upper end of humerus and lower ends of radius and ulna. In lower limb, the lower end of femur and upper end of tibia are the growing ends. The nutrient arteries along with veins pass through this canal.
Where is the nutrient foramen of the tibia?
In most cases, the outer nutrient foramen was found on the posterolateral aspect of the upper-third of tibia at about 32% of tibial length; the inner foramen was found at the middle third of the tibia (41% of tibial length).
What is the purpose of the nutrient foramen?
Background Nutrient foramen is an opening into shaft of humerus which gives passage to the blood vessels of medullary cavity. The knowledge of nutrient foramen is important in surgical procedures like bone grafting and more recently in microsurgical vascularized bone transplantation.
What does the nutrient artery of tibia supply?
The tibial nutrient artery (TNA) is the main artery of the tibial diaphysis supplying the bone marrow and the inner two-thirds of the cortex [1,2,3,4]. In most cases, a single TNA exists, and only very rarely can two or three nutrient artery canals be observed along the tibial diaphysis [4,5,6].
Which bone has largest nutrient artery?
tibia
The nutrient artery (a. nutricia tibiæ) of the tibia arises from the posterior tibial, near its origin, and after supplying a few muscular branches enters the nutrient canal of the bone, which it traverses obliquely from above downward. This is the largest nutrient artery of bone in the body.
What is meant by nutrient foramen?
A nutrient foramen (plural: nutrient foramina) or vascular channel is a small tunnel through the cortex of a long bone containing a nutrient artery which supplies the bone.
Which bone in the human body is the longest?
femur
The longest bone in the human body is called the femur, or thigh bone.
Why nutrient foramen is away from growing end?
The growing end is supposed to grow at least twice as fast as the other end. The nutrient artery runs away from the growing end as the growing bone might pull and rupture the artery. So the nutrient foramina are directed away from the growing end.
Why nutrient artery of tibia is largest?
The nutrient artery (a. nutricia tibiæ) of the tibia arises from the posterior tibial, near its origin, and after supplying a few muscular branches enters the nutrient canal of the bone, which it traverses obliquely from above downward. This is the largest nutrient artery of bone in the body.
Do arteries go into bones?
The blood supply to bone is delivered to the endosteal cavity by nutrient arteries, then flows through marrow sinusoids before exiting via numerous small vessels that ramify through the cortex.
What is the metaphysis?
The metaphysis is the region where the epiphysis joins the diaphysis; in a growing bone this corresponds to the calcified layer of the epiphyseal plate together with the interdigitating bone (see Figure 4.19). The interface between the hypertrophic and calcified layers is sometimes referred to as the tidemark.