Biology
Rajeev, a 10 year old boy, went to an Ophthalmologist to get his eyes tested. He noticed a poster in the clinic with questions related to the parts of human eye. Help Rajeev answer the questions:
(a) Which is the fluid that lubricates the eye?
(b) Which cells help in colour vision?
(c) Which nerve sends impulses from the eyeball to the brain?
(d) Name the structure that gives colour to the eyes.
(e) Name the part that allows entry of light rays into the eye.
Related Questions
Given below is the diagram of a human heart. Read the information below the diagram and fill in the blanks:
The human heart pumps blood throughout the body. It is the size of a large fist. The heart is located between the lungs in the thoracic cavity. It has four chambers. The heart functions all through the lifespan of a person and is responsible for the survival of the person.
The heart is enclosed by a membrane called (a) …………… (Pericardium / Pleura). The ventricles give rise to two large blood vessels called (b) …………… (Pulmonary vein / Pulmonary artery) and (c) …………… (Aorta / Venacava). The flaps of the cuspid valves are kept in position by (d) …………… (Chordae tendinae / Endometrium). (e) …………… (Hepatic / Coronary) arteries supply oxygenated blood to the walls of the heart.
Choose the odd term out from each of the following set of terms. Mention the category to which the remaining three belong:
(a) Sulphur dioxide, Oxygen, Carbon monoxide, Nitrogen dioxide.
(b) Pons, Epidermis, Xylem, Phloem.
(c) Tympanum, Pinna, Auditory canal, Malleus.
(d) Ureter, Urethra, Uterus, Renal Pelvis.
(e) Stomata, Lenticles, Cuticle, Root hair.
Study the diagram given below and match the structure with its function:
Explain the term Menarche.