Tissue Types Flashcards
What are the 4 tissue types in the body?
- Nervous
- Muscular
- Epithelial
- Connective
What are the 3 ways light can be?
Absorbed
Transmitted
Reflected
How many bones is the orbit made up of?
7
What are the 6 muscles of the eye?
- superior oblique
- superior rectus
- medial rectus
- lateral rectus
- inferior rectus
- inferior oblique
When light rays impinge on the surface of the eye, what does it encounter/hit ?
(photon) hits the tearfilm
What is the outer coat of the eye ?
Sclera (opaque)
What is the front of the eye modified to ?
Transport cornea
What is the corneoscleral junction?
Limbus
After traversing the anterior chamber , what happens to the light
It reaches the lens
How does light focus on the retina?
By the cornea and lens acting together
What is the choroid?
Its is between the retina and sclrera which contains the vascular blood supply to the retina
How are the transparent cornea and lens avascular?
Because they recieve nutrients from the aqueous humour which fills the anterior chamber.
What fills the posterior chamber?
Filled with jelly like vitreous humour
Where are the 2 groups of muscle in the eye?
Iris- which can alter the size of the pupil
Cilary body- change the shape of the lens during the process of accomadation.
What is the bulk of the tear film produced by?
Lacrimal Gland
What tissue makes up most of the retina?
Nervous tissue
What are the nerve cells known as?
Neurones
What structures are the nerve cells associated with in the eye?
cornea (sensory)
cilary (motor)