Red blood cells carry oxygen from the lungs throughout the body and drop it off to tissues and cells. White blood cells fight infections by engulfing bacteria and viruses. Platelets help form blood clots to stop bleeding when blood vessels are damaged. The blood components are suspended in plasma, which allows blood to circulate throughout the body delivering oxygen and nutrients and removing wastes.
Hematopoietic stem cells within the bone marrow produce to 2 main forms of cells: myeloid and liquid body substance lineages. These embrace monocytes, macrophages, neutrophils, basophils, eosinophils, erythrocytes, nerve fiber cells, and megakaryocytes or platelets, similarly as T cells, B cells, and natural killer cells. The different forms of hemopoietic stem cells vary in their regenerative capability and efficiency. Some are strong, oligopotent or unipotent as determined by what percentage forms of cell they will produce. Pluripotent hemopoietic stem cells have the subsequent properties: Renewal: they will reproduce another cell the image of themselves. Differentiation: they will generate one or a lot of subsets of a lot of mature cells. The process of development of various blood cells from these pluripotent stem cells is thought as sanguification.
Stem cells:A topic related to genetics
Slides cover all the aspects of stem cells
Classification of stem cells
Location of stem cells in Human body
Uses of stem cells in the treatment of diseases
Characteristics of stem cells
Basic terms related to stem cells
Hematopoietic stem cells within the bone marrow produce to 2 main forms of cells: myeloid and liquid body substance lineages. These embrace monocytes, macrophages, neutrophils, basophils, eosinophils, erythrocytes, nerve fiber cells, and megakaryocytes or platelets, similarly as T cells, B cells, and natural killer cells. The different forms of hemopoietic stem cells vary in their regenerative capability and efficiency. Some are strong, oligopotent or unipotent as determined by what percentage forms of cell they will produce. Pluripotent hemopoietic stem cells have the subsequent properties: Renewal: they will reproduce another cell the image of themselves. Differentiation: they will generate one or a lot of subsets of a lot of mature cells. The process of development of various blood cells from these pluripotent stem cells is thought as sanguification.
Stem cells:A topic related to genetics
Slides cover all the aspects of stem cells
Classification of stem cells
Location of stem cells in Human body
Uses of stem cells in the treatment of diseases
Characteristics of stem cells
Basic terms related to stem cells
Hematophoisis is the synthesis of all blood cells within the bone marrow under the influence of certain hormones and growth factors, what are the different step, stages, and factors are given in this presentation
Hematopoiesis is the process through which the body manufactures blood cells. It begins early in the development of an embryo, well before birth, and continues for the life of an individual. Hematopoiesis begins during the first weeks of embryonic development. All blood cells and plasma develop from a stem cell that can develop into any other cell.
Hematopoiesis is the process of blood cells being differentiated from hematopoietic stem cells. This process must be repeated on a regular basis in order to keep the body's circulating blood cell numbers stable. Blood cells are divided into three main linages:
Reticulocytes and erythrocytes make up the Erythroid Lineage (red blood cells).
Lymphocytes (B and T cells) and natural killer cells make up the lymphoid lineage.
Macrophages, dendritic cells, granulocytes, and megakaryocytes are all members of the myeloid lineage.
## Site Of Hematopoiesis
Yolk sac
Liver and spleen
Bone marrow
Gradual replacement of active (red) marrow by tissue inactive (fatty)
Expansion can occur during increased need for cell production
the presentation tells you about hematopoiesis which is the process of formation of blood cells i.e. RBC’S, WBC’S and platelets is called as hematopoiesis and the sites where it occurs are known as hematopoietic tissues or organs.
Hematophoisis is the synthesis of all blood cells within the bone marrow under the influence of certain hormones and growth factors, what are the different step, stages, and factors are given in this presentation
Hematopoiesis is the process through which the body manufactures blood cells. It begins early in the development of an embryo, well before birth, and continues for the life of an individual. Hematopoiesis begins during the first weeks of embryonic development. All blood cells and plasma develop from a stem cell that can develop into any other cell.
Hematopoiesis is the process of blood cells being differentiated from hematopoietic stem cells. This process must be repeated on a regular basis in order to keep the body's circulating blood cell numbers stable. Blood cells are divided into three main linages:
Reticulocytes and erythrocytes make up the Erythroid Lineage (red blood cells).
Lymphocytes (B and T cells) and natural killer cells make up the lymphoid lineage.
Macrophages, dendritic cells, granulocytes, and megakaryocytes are all members of the myeloid lineage.
## Site Of Hematopoiesis
Yolk sac
Liver and spleen
Bone marrow
Gradual replacement of active (red) marrow by tissue inactive (fatty)
Expansion can occur during increased need for cell production
the presentation tells you about hematopoiesis which is the process of formation of blood cells i.e. RBC’S, WBC’S and platelets is called as hematopoiesis and the sites where it occurs are known as hematopoietic tissues or organs.
Those are a couples of photos showing how Haiti was before and after earthquake. Very devastating. Now Haiti need is sons more than ever to become what it was before and even more
Sonia Allard de NVI et Christine Dicaire de Club med Canada ont donné une conférence sur le virage web adopté par Club Med lors de la conférence Infopresse sur le tourisme.
1. Entry slip: Where is O2 “picked up” by the blood and
where is it “dropped off”?
Lesson 4.3- Compare the characteristics of blood
components.
(p308) of Biology-McGraw-Hill Ryerson)
I. Terms:
a.Blood components: red blood cells, white
blood cells, platelets and blood plasma
are all different blood components
b.“-cyte”: cell
c. µm: micrometre, or, 1/1000th of a
millimetre
d. relative size: the size of the particles
compared to other similar substances (in
this case, other blood components)
II. Components of Blood:
a.Red Blood Cells (also known as
Erythrocytes)
2. i. Appearance: red, donut-like (no hole
in middle, though)
ii. Origin: made in red bone marrow
iii. Numbers:
A. 5,500,000 (male) 4,500,000
(female) per cubic millimetre of
blood
B. 44% of blood
iv. Relative Size: small compared to
other blood components (8 µm
diameter)
v. Functions: carries O2 and CO2 to and
from the body’s cells
b. White Blood Cells -Leucocytes
i. Appearance: spherical (like a ball)
ii. Origin: red bone marrow
iii. Numbers: 6000/mm3 of blood – 0.5%
of blood
iv. Relative Size: largest (up to 25 µm)
3. v. Functions: kills foreign particles such
as bacteria and fungi by engulfing
them then digesting them
A. Youtube search: “ZIZ 074
Makrophage frisst
Pneumokokken – phagocytosis”
B. Doctors will test you for illness by
measuring the amount of
leucocytes in your blood-if you
have much more that 6000/mm3
you are probably fighting an
infection
c. White Blood Cells -Lymphocytes
i. Appearance: spherical
ii. Origin: spleen and lymph glands
iii. Numbers: 2000/mm3 of blood – 0.5%
of blood
iv. Relative Size: large (about 10 µm)
v. Functions: forms antibodies fight
bacteria and viruses
4. A.Anti-bodies are like specialized
proteins that are “trained” to
quickly recognize a type of virus
or bacteria that has been in the
body before and help the white
blood cells kill it– we call this
“immunity”
B. Youtube search: “3D Medical
Animation: Antibody Immune
Response”-nucleusanimation
d. Platelets
i. Appearance: jagged
ii. Origin: red bone marrow and lungs
iii. Numbers: 250,000 per mm3 of blood
iv. Relative Size: very small (only about 2
µm)
v. Functions: group up with other
platelets and become very sticky to
form blood clots when a blood vessel
is broken.
5. A. Hemophiliac: “hemo” means
blood, and “philiac” means “likes
to”, so hemophiliacs “like to
bleed” – their blood does not
contain enough platelets and
even a small cut can cause a
hemophiliac to bleed to death
unless they get to a hospital
e. Plasma
i. Appearance: yellow liquid
ii. Origin:
A.Water-from water in foods that
we eat or drink. Also contains
nutrients, wastes and dissolved
gases.
iii. Numbers: 55% of blood
iv. Relative Size: smallest (so small that it
can pass through a capillary wall)
v. Functions:
A. Makes “blood” a fluid so that all
the other blood components can
6. be pumped around the
circulatory system.
B. Transports nutrients/hormones/
water/wastes/gases to other
areas of the body
f. Youtube search: “The Components of
Blood and Their Importance”
-ASHWebmaster
I. Homework Assignment:
a.Complete the crossword handout
b.Due tomorrow.