.

2021-12-06 15:39:08 𝘼𝙇𝙇 𝘼𝘽𝙊𝙐𝙏 𝙏𝙄𝙎𝙎𝙐𝙀𝙎

Tissues are categorized as −
Plant Tissue
Animal Tissue

❀❀❀Plant Tissue❀❀❀
Following are the major types of plant tissue −
Meristematic Tissues
Permanent Tissues


Simple Permanent Tissues
Parenchyma
Collenchyma
Sclerenchyma
Epidermis

❀ Complex Permanent Tissue ❀
Xylem
Phloem

❀ Meristematic Tissue ❀
Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.

Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.

Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).

Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.

Lateral Meristem is found in stem or root region and helps in their growth.

Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.


Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.

Permanent Tissue is further categorized as −
Simple Permanent Tissue and
Complex Permanent Tissue

Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
Parenchyma
Collenchyma
Sclerenchyma
Epidermis

Parenchyma tissue provides support to plants and also stores food.
Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
The cells of Sclerenchyma tissue normally are dead.
The outermost layer of cells is known as epidermis.
The epidermis is usually made up of a single layer of cells.
The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.


Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.

Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.

Complex Permanent Tissue is categorized as;
Xylem
Phloem

Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.

Xylem is accountable for the conduction of water and mineral ions/salt.

Phloem, normally, is made up of four types of elements namely −
Sieve tubes
Companion cells
Phloem fibers and
Phloem parenchyma

Phloem tissue transports food from leaves to other parts of the plant. Open / Comment

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2021-12-04 17:26:15 CHECKLIST CHECK

PHYSICS

CHEMISTRY

BIOLOGY Open / Comment

2021-11-29 17:16:50 Male Reproductive System

1. The elastic tissue which connects the cauda epididymis to the scrotal sac is
(a) Caput epididymis
(b) Scrotal ligament
(c) Gubernaculum
(d) Tendinous cord

2. By the contraction of the spermatic cord, the testis of man are not taken to the abdominal cavity due to this structure
(a) fat bodies and gubernaculum present over the testis
(b) attachment of testis by gubernaculum to the scrotal sac only
(c) narrowness of inguinal canal
(d) both (b) and (c)


3. The seminiferous tubules of the testis are lined by the germinal epithelium consisting of
(a) spermatids
(b) cells of Sertoli
(c) spermatogonium
(d) spermatocytes


4. These cells of the testes secrete testosterone
(a) Sertoli cells
(b) cells of germinal epithelium
(c) Cells of Leydig or interstitial cells
(d) secondary spermatocytes


5. There is a connective tissue cord extending between the testis and abdominal wall known as
(a) mesenteric cord
(b) gubernaculum
(c) testis cord
(d) spermatic cord


6. Which of these is an accessory reproductive gland in male mammals
(a) Inguinal gland
(b) Prostate gland
(c) Mushroom-shaped gland
(d) Gastric gland


7. There are some special types of cells present in the seminiferous tubules known as Sertoli cells which are
(a) somatic cells
(b) germinal cells
(c) protective cells
(d) reproductive cells


8. Seminiferous tubules develop central lumen after
(a) Old age
(b) Prepuberal time
(c) Birth
(d) Puberty


9. Another name for Bulbourethral gland is
(a) Meibomian gland
(b) Prostate gland
(c) Perineal gland
(d) Cowper’s gland


10. In man, Cryptorchidism is the condition when
(a) testes do not descent into the scrotum
(b) there are two testes in each scrotum
(c) testis degenerates in the scrotum
(d) testis enlarges in the scrotum Open / Comment

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2021-11-29 14:32:52 𝐌𝐧𝐞𝐦𝐨𝐧𝐢𝐜𝐬 and 𝐭𝐫𝐢𝐜𝐤𝐬 for 𝐟𝐮𝐧𝐠𝐢 𝐞𝐱𝐚𝐦𝐩𝐥𝐞𝐬.

𝐁𝐚𝐬𝐢𝐝𝐨𝐦𝐲𝐜𝐞𝐭𝐞𝐬-
𝐓𝐫𝐢𝐜𝐤:- Agar Usne Puccha To 𝐁𝐚𝐬.

𝐀𝐠𝐚𝐫- Agaricus (mushroom)

𝐔𝐬𝐧𝐞- Ustilago (rust fungus)

𝐏𝐮𝐜𝐡𝐡𝐚- Puccnia (smut fungus)

Ascomyce𝐭𝐞𝐬-
𝐓𝐫𝐢𝐜𝐤:- Yash and Astha ne Naya Pencil 𝐊𝐡𝐚𝐫𝐢𝐝𝐚

𝐲𝐚𝐬𝐡- Yeast

𝐀𝐬𝐭𝐡𝐚- 𝐀𝐬𝐩𝐞𝐫𝐞𝐠𝐢𝐥𝐥𝐮𝐬

𝐍𝐚𝐲𝐚- 𝐍𝐞𝐮𝐫𝐨𝐬𝐩𝐨𝐫𝐚

𝐩𝐞𝐧𝐜𝐢𝐥- Penecillium

Many 𝐦𝐞𝐦𝐛𝐞𝐫𝐬 like 𝐦𝐨𝐫𝐞𝐥𝐬 and 𝐛𝐮𝐟𝐟𝐥𝐞𝐬 are e𝐞𝐝𝐢𝐛𝐥𝐞 and are considered 𝐝𝐞𝐥𝐢𝐜𝐚𝐜𝐢𝐞𝐬.

𝐏𝐡𝐲𝐜𝐨𝐦𝐲𝐜𝐞𝐭𝐫𝐬-
𝐓𝐫𝐢𝐜𝐤𝐬:-RaMu Alu Pheco
Ra- Rhyzopus (bread mould)

𝐌𝐮- Mucor

𝐀𝐥𝐮- Albugo (parasitic fungi on mustard)

𝐏𝐡𝐞𝐜𝐨- Pythium

𝐃𝐞𝐮𝐭𝐞𝐫𝐨𝐦𝐲𝐜𝐞𝐭𝐞𝐬 _
𝐓𝐫𝐢𝐜𝐤𝐬:- 𝐀𝐂𝐓

𝐀- alterneria

𝐂- Collectotrichum

𝐓 - 𝐓𝐫𝐢𝐜𝐡𝐨𝐝𝐞𝐫𝐦𝐚


Open / Comment

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2021-11-28 15:53:14 Important Facts About Human Body
=========================

Largest and strongest Bone in the body:
Femur (thigh bone)

Smallest Bone in the body
Stapes in ear

Number of Cells in the body
75 trillion

Volume of Blood in the body
6 litres (in 70 kg body)

Number of Red Blood Cells(R.B.C.)
In male: 5 to 6 million/cubic mm
In female: 4 to 5 million/cubic mm

Life span of Red Blood Cells(R.B.C.)
100 to 120 days

Life span of White Blood Cell(W.B.C.)
3-4 days

Normal White Blood Cell(W.B.C.) count
5000-10000/cubic mm

Time taken by R.B.C. to complete one cycle of circulation:
20 seconds

Other name of Red Blood Cell (R.B.C.):
Erythrocytes

Largest White Blood Cells:
Monocytes

Smallest White Blood Cells:
Lymphocyte

Who discovered Blood Group:
Karl Landsteiner

Blood Platelets count:
150,000 - 400,000 platelets per micro litre

Haemoglobin (Hb):
In male: 14-15 gm/100 c.c. of blood
In female: 11-14 gm/100 c.c. of blood

Hb content in body:
500-700 gm

pH of Urine:
6.5-8

pH of Blood:
7.36-7.41

Volume of Semen:
2-5 ml/ejaculation

Pulse rate:
72 per minute

Thinnest Skin:
Eyelids

Weight of Heart:
200-300 gm

Open / Comment

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2021-11-28 14:22:51 NON-CHORDATES ENDED NOW CHORDATES HERE IS
𝘾𝙇𝘼𝙎𝙎 𝘼𝙈𝙋𝙃𝙄𝘽𝙄𝘼:-


The characteristics of the organisms present in class amphibia are as follows:

These can live both on land and in water.

They are ectothermic animals, found in a warm environment.

Their body is divided into head and trunk. The tail may or may not be present.

The skin is smooth and rough without any scales, but with glands that make it moist.

They have no paired fins. Unpaired fins might be present.

They have two pairs of limbs for locomotion.

They respire through the lungs and skin. Gills might be present externally in some adults.

The heart is three chambered.

The kidneys are mesonephric. The excretory material includes ammonia and urea.

They possess ten pairs of cranial nerves.

The lateral line is present during their development.

The sexes are separate and fertilization is usually external. However, in salamanders, the fertilization is internal.

Development is indirect with metamorphosis.

Breeding occurs in water. The copulatory organs are absent in males.

Eg., Frogs, Salamanders

Open / Comment