(i) The female reproductive system of rabbit consists of a pair of ovaries which are small ovoid structures. They are located behind the kidneys in the abdominal cavity.
(ii) A pair of oviducts opens into the body cavity by a funnel shaped opening from each side of the ovary.
(iii) The anterior part of the oviduct is the fallopian tube. It leads into a wider tube called the uterus.
(iv) The uterus join together to form a median tube called vagina.
(v) The common tube is formed by the union of urinary bladder and the vagina and is called the urinogenital canal or vestibule. It runs backwards and opens to the exterior by a slit-like aperture called vulva.
(vi) A pair of Cowper's gland and perineal gland are the accessory glands present in the female reproductive system

(i) Teeth are hard bone-like structures used to cut, tear and grind the food materials. The rabbit has two sets of teeth in its life time. The existence of two sets of teeth in the life of an animal is called diphyodont dentition
(ii) In rabbit the teeth are of different types. Hence, the dentition is called heterodont. There are four kinds of teeth in mammals viz. the incisors (I), Canines (C), Premolars (PM) and Molars (M). This is expressed in the form of a dental formula.
(iii) Dental formula is the simple method of representing the teeth of a mammal. The number of each kind of tooth in the upper and the lower jaws on one side is counted
(iv) In rabbit, the dental formula is \(\left( 1\cfrac { 2 }{ 1 } ,C\cfrac { 0 }{ 0 } ,PM\cfrac { 3 }{ 2 } ,M\cfrac { 3 }{ 3 } \right) \) which is written as \(\cfrac { 2033 }{ 1023 } \) Canines are absent.
(v) The gap between the incisors and premolar is called diastema. It helps in mastication and chewing of food - in herbivorous animals.

(i) Respiration takes place by a pair of lungs, which are light spongy tissues enclosed in the thoracic cavity.
(ii) Each lung is enclosed by a double membranous pleura.
(iii) Atmospheric air passes through the external nostril and nasal passages into the pharynx. From the pharynx it passes through the glottis into the wind pipe.
(iv) The anterior part of the wind pipe is enlarged to form the larynx or voice box with its wall supported by four cartilaginous plates. Inside the larynx lies the vocal cord and its vibrations result in the production of sound.
(v) The larynx leads into trachea or wind pipe. Tracheal walls are supported by rings of cartilage which help in the free passage of air.
(vi) The epiglottis prevents the entry of food into the trachea through the glottis.
(vii) The trachea divides into two branches called the bronchi one entering into each lung and dividing into further branches called bronchioles which end in alveoli.

The Ieech makes a triradiate or 'Y' shaped incision in the skin of the host by the jaws protruded through the mouth and sucks the blood by muscular pharynx.

There are different types of teeth in rabbit. Hence, called as heterodont denitition.

CNS stand for Central Nervous System.

Lungs are attached to the two bronchi.

There are eleven pairs of testes in leech.

Respiration takes place through skin.

The skin of leeches is permeable. If salt is added, it creates an osmotic pressure. Water is pulled out from the body of leeches. It can lead to dehydration. Thus leeches immediately fall off when salt is applied.