are protective structures. 3. Conjunctiva is from the eye, 4. Lacrimal apparatus produces and drains includes the lacrimal gland, which produces tears and mucus, lacrimal puncta, lacrimal canaliculi, lacrimal sac, and the nasolacrimal duct. 5. Extrinsic Eye Muscles are six muscles that originate from the orbit wall and insert into the outer layer of the eyeball, which allows for precision movements. List these six muscles:
are protective structures. 3. Conjunctiva is from the eye, 4. Lacrimal apparatus produces and drains includes the lacrimal gland, which produces tears and mucus, lacrimal puncta, lacrimal canaliculi, lacrimal sac, and the nasolacrimal duct. 5. Extrinsic Eye Muscles are six muscles that originate from the orbit wall and insert into the outer layer of the eyeball, which allows for precision movements. List these six muscles:
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
D. C. Fill in blanks.
Transcribed Image Text:accessory structures that have various roles in the protection and function of the
1. Eyelids, or palpebrae, are two thin folds that cover the anterior region of the
B. Accessory Structures of the Eye. The orbit contains several of the following
eyeball :
orbit, which prevent access to foreign obiects and distribute tears during
blinking. Eyelids have the following anatomical features: tarsal plates, tarsar
glands, medial and lateral commissures, lacrimal caruncle, the orbicularis
oculi, and levator palpebrae superioris muscles.
2. Eyebrows and Eyelashes are protective structures.
3. Conjunctiva is
4. Lacrimal apparatus produces and drains
from the eye,
includes the lacrimal gland, which produces tears and mucus, lacrimal puncta,
lacrimal canaliculi, lacrimal sac, and the nasolacrimal duct .
5. Extrinsic Eye Muscles are six muscles that originate from the orbit wall and
insert into the outer layer of the eyeball, which allows for precision
movements. List these six muscles:
and
C. The Eyeball is a hollow sphere that consists of an outer wall that surrounds
several chambers and supports the lens, which focuses
as it
enters the eye. The three distinct tissue layers of the eyeball are the
layer,
layer, and the
layer.
These layers maintain the shape of the eyeball and transduce light into electrical
signals :
1. Layers of the Eyeball: The Fibrous Layer, the outermost layer, is composed
of the following two components:
a. The sclera, the white part of the eye, covers nearly the entire eye. It is
fibers that allows it
made up irregularly arranged_
to resist deformation from external internal forces to maintain its shape
207
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