[DOC] [TLE] The Eyes and Vision. Information on the eyes and eye problems ... [PAR] The pupil can change size (through changes in the iris) in order to regulate the ... 
The ciliary body is a part of the eye which includes the ciliary muscle (which ... 
Depending on the angle of the light coming into it, the lens becomes more or less
... [DOC] [TLE] Light and shadows: Lightness and darkness in space - The Earth ... [PAR] Students will explore the way an object's size, shape, position, and orientation ... 
Demonstrate how one object can create different shadows by changing its ... In 
most cases, only part of the light is reflected, while some is absorbed by the 
object. ..... where the Sun is located based on the shadow's size, shape, and 
direction. [DOC] [TLE] Eye Health: Anatomy of the Eye - VisionAware [PAR] It is the second part of your eye, after the cornea, that helps to focus light and ... 
part of the ciliary body, are attached to the lens and contract or release to change
... [DOC] [TLE] Lens (anatomy) - Wikipedia [PAR] The lens is a transparent, biconvex structure in the eye that, along with the 
cornea, helps to refract light to be focused on the retina. The lens, by changing 
shape, functions to change the focal distance of the ... The lens has three main 
parts: the lens capsule, the lens epithelium, and the lens fibers. The lens capsule 
forms the... [DOC] [TLE] Pupil: Light, Perception & Life Science Activity | Exploratorium ... [PAR] You can watch the pupil of your eye change size in response to changes in 
lighting. ... to determine how light shining in one eye affects the size of the pupil in 
your other ... Part of the optic nerve from one eye crosses over and couples to the 
muscles ... The size of your pupils actually reflects the state of your body and 
mind. [DOC] [TLE] 100 Interesting Facts About the Human Body [PAR] As a result, it shouldn't be any surprise that even body parts and functions we 
deal with every day have bizarre ... The brain operates on the same amount of 
power as 10 watt light bulb. The cartoon .... The adrenal glands change size 
throughout life. .... months without food depending on their body fat and other 
factors. Sleep... [DOC] [TLE] Changes in the Body With Aging - Older People's Health Issues ... [PAR] The body changes with aging because changes occur in individual cells and in 
whole organs. These changes result in changes in function and in appearance. [DOC] [TLE] Resource Materials: Compound Light Microscopy - Bates College [PAR] Be aware of this change in working distance with increasing magnification so as 
to prevent ... C. Parts of the Monocular Compound Light Microscope: ... Body tube
: contains mirrors and prisms which direct the image to the ocular lens. .... 
Knowing this for each objective lens, you can compare the size of the specimen 
against... [DOC] [TLE] Eyes - KidsHealth [PAR] We depend on sight more than any other of our senses to maneuver through the 
... Although the eyes are small compared with most of the body's other organs, ... 
enabling us to judge distance and the size of objects to help us move around 
them. ... And our eyes constantly adapt to the changing environment  for 
example,... [DOC] [TLE] growth | biology | Britannica.com [PAR] Rather, it occurs according to a plan that eventually determines the size and ... 
The increase in size and changes in shape of a developing organism depend on 
the .... The rates of both growth and cell division can vary widely in different body 
parts. .... Insufficient light causes death or retardation of growth in green plants. [DOC] [TLE] Ciliary Body - National Library of Medicine - PubMed Health - NCBI [PAR] A part of the middle layer of the wall of the eye. The ciliary body includes the ring-
shaped muscle that changes the size of the pupil and the shape of the lens... [DOC] [TLE] Neuroscience for Kids - The Eye and Its Connections [PAR] Part 2 discusses how various aspects of a visual scene are processed

Question: The size of this body part changes, depending on the light
Answer: the pupil