Tag: busy at work - our internal organs

Ameloblasts are cells present only during tooth development that deposit tooth enamel, which is the hard outermost layer of the tooth forming the surface of the crown.

• The liver breaks down and filters out harmful substances in the body. It also converts vitamins, nutrients and medicines into substances that our bodies can use.
•  A central role in the toxicity of alcohol may be played by acetaldehyde itself. Although the liver converts acetaldehyde into acetic acid, it reaches a saturation point where some of it escapes into the blood stream.
•  The accumulated acetaldehyde exerts its toxic effects by inhibiting the mitochondria reactions and functions. Hence, The reason why the liver of alcohol addicts gets damaged is that it Accumulate excess of fats.

Liver along with muscles stores excess glucose as glycogen, which can be used in times of starvation to maintain blood glucose levels. Excess carbohydrates are also stored as fat in adipose tissue around visceral organs and underneath the skin. During starvation the fat in the adipose tissue can be metabolised to derive energy.

Rabbit is herbivorous animal and depends on cellulose based food. It has no canines in jaw. The dental formula is  2 0 3 3 / 1 0 2 3 for incisors, canine, premolar and molars in each jaw. The total number of teeth in upper jaw are 16 and 12 teeth in lower jaw. Thus total number of teeth are 28.

Rabbit is herbivorous animal and depends on cellulose based food. It has no canines in jaw. The dental formula is  2 0 3 3 / 1 0 2 3 for incisors, canine, premolar and molars in each jaw. Thus the canines are absent. There is a gap in both the jaws at the location of canines. It is called as diastema. The total number of teeth in upper jaw are 16 and 12 teeth in lower jaw. The total number of teeth are 28. 

Palate is differentiated into two parts- (i) Hard Palate  and (ii) Soft Palate. 

Teeth are ecto-mesodermal in origin. Major portion of teeth arises from Dermis. Part of tooth present outside the gums only is derived from ectoderm or Epidermis (Enamel part). In human teeth of upper jaw are attached to the Maxilla bone. While teeth of lower jaw are attached to mandible jaw. But in rabbit upper incisors are attached to premaxilla. While upper premolars and molars attached to the maxilla bone. While lower teeth are attached to dentary bone. Dentary comprises of the lower jaw.

Carnassial tooth is the fourth premolar. In wild canines, it is the main tooth used to break up or crush hard material in their diet such as bones or large pieces of meat. 

The medulla oblongata is the part of the brainstem that controls involuntary functions, including the vomiting reflex.

Haemorrhoids which is commonly known as piles occurs due to the swelling of veins in anus or rectum.