Download 1D/1E Worksheet

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
1D Continued Worksheet
1) Cleavage produces two smaller daughter cells called________________. During cleavage,
____________ or cell division continues without the cell ______________in size.
2) When the cell has reached the 16 or more cell stage the solid ball of cells is referred to as
3) By the 4th of 5th day the _____________ consists of approximately 100 cells and is referred
to as a_________________, which is a ___________filled hollow sphere.
4) The outer layer of cells of the blastocyst, which is a single layer of cells referred to as
the__________________, forms the______________. While the inner cell mass referred to
as the __________________ disc develops into the individual.
5) Implantation takes place when _____________ adhere to the properly prepared_________.
6) Once implanted the __________________proliferate and form two distinct layers,
the____________________ , which are cells of the inner layer and they _________their cell
membranes, where the ____________________which make up the outer layer ________their
plasma membrane and invade the_______________________ .
7) The primitive streak is a raised area on the _____________groove and establishes the
______________ axis of the embryo.
8) The rod of mesodermal cells that serves as the _________or longitudinal support is referred
to as the________________.
9) Gastrulation sets the stage for ____________________which is the formation of all body
10) __________________ is the first event of organogenesis which gives raise to the _______
and __________________.
11) Somites, are one of the ___ specialized groups of_____________, and are lusters of cells,
_____pairs, that are made up of ___________________which produce ______________and
ribs. __________________which help form ____________skin dermis and ______________
which form skeletal muscle of the__________, trunk, and____________.
12) __________________Mesoderm forms gonads, which are __________or
______________ along with kidneys.
13) Placenta forms from embryonic __________________ tissues and maternal
_______________ tissues.
14) Chorion develops fingerlike villi that become ________________ and extend to the embryo
as umbilical __________ and_________ , it also helps forms the placenta by ____________
the embryonic body and all other membranes.
Unit 1E
15) Functions of the skin are: a barrier or _______________, temperature______________,
___________, metabolism in the ____________ of Vitamin D, blood ____________and
16) Skin consists of two major regions the______________, the outer most and
the__________, the middle region and the layer beneath is referred to as the
__________________or superficial______________.
17) Epidermis is composed of____________ _______________ epithelium, and the dermis and
hypodermis are composed of _______________tissue.
18) As cells of the epidermis, _________________ produce the fibrous protein keratin, and
melanocytes which produce the brown pigment___________, but skin also gets its color from
____________ and blood vessels.
19) Langerhans cells are epidermal _______________that help activate the _________system,
while tactile cells such as ___________ cells functions as touch ____________in association
with ____________ nerve endings.
20) Stratum _________which is the base layer or __________ epidermal layer which is
attached to the__________. Here the youngest ____________cells undergo rapid division
called ___________ to regenerate the superficial layers.
21) The next layer up is the Stratum___________, which gets its name due to the web-like
system of the cells which has pre-keratin ___________ attached to ____________ which gives
it a “prickly look. In this layer _________ granules and ___________ cell are abundant.
22) This middle layer is the Stratum ___________a thin layer with only __ to __ layers of cells
which are __________ and organelles are______________. It gets its name due to the
________________and ____________ granules accumulating in the granulosum cells and this
23) Second from the top is the Stratum __________ or clear layer which is thin and
____________ and consists of a few layers of flat dead _____________and is present only in
thin / thick skin.
24) The very top or outer most layer is the Stratum ______________or the Horny Layer, of
_________________ cells meaning the cell’s ____________ and organelles are replaced by
keratin _____________which is left as the cells die. This layer provides most of the
________________ thickness.
25) The functions of the epidermis are________________, protection from ___________
26) Dermis is vascular and _____________ and has two regions, superficial also called _______
and deep also called_______________.
27) The ___________ region is loose __________ connective tissue, and the dermal papillae
which are finger like ______________ into the epidermis and have __________endings that
detect_______, touch and _____________have increased _________ vessels and
modified_____________. Vitamin D is ______________ here.
28) The reticular region is composed of _________ connective tissue in which _________and
elastic fibers run ___________to skin’s surface, and the spaces are filled with ________tissue.
29) The superficial _________ or hypodermis which covers the __________ under the skin has
__________ from the dermis that ___________the skin to deeper________and_________.