Collagen fibres are the most widespread and made up of fibrous protein, collagen. They are widely distributed in every part of the body. Collagen fibers predominate, but elastic and reticular fibers are also present.
(a) Cork cells possesses———on their walls that makes it impervious to gases and water. Water hyacinth float on the water surface because of the presence of the air cavities present in the parenchyma tissue. Epithelial cells with cilia are found in respiratory tract of our body Lining of blood vessels is made up of squamous epithelium
Explain the concept of Columnar epithelium, covered in Chapter 6 of NCERT Exemplar Solutions for Class 9 Science.
Answer is (b) Columnar epithelium (a) Stratified squamous epithelium Hence, the statement “Apical and Intercalary meristem are permanent tissue” is wrong. When meristematic tissue takes up a specific role and loses its ability to divide, it becomes a permanent tissue. They are responsible for the growth of plants. They are not specialised to perform a specific function.
(d) Epithelial cells with cilia are found in———of our body (d) Movement of chocolate in your intestine- is a function of involuntary muscles (c) Writing with hand- is a function of voluntary muscles (b) Pumping of the heart- is a function of involuntary muscles
Types of Loose Connective Tissue
Skin epithelial cells are arranged in many layers to prevent wear and tear. Simple squamous epithelial cells are extremely thin and flat and form a delicate lining. The epithelium is usually separated from the underlying tissue by an extracellular fibrous basement membrane. It is obvious that anything entering or leaving the body must cross at least one layer of epithelium. Cells in the epithelial tissue are tightly packed and form a continuous sheet.
Reticular fibres support the early extracellular matrix during the formation of scar tissue, the healing of wounds, and general development. They form the initial structure of every tissue they are a part of, demonstrating their essential support function. Due to the distribution of reticular fibres, it exhibits a branching, and mesh-like appearance frequently referred to as reticulum (reticulin). It may be localised, only affecting a part of the skin or systemic, impacting vital organs. The systemic lupus erythematosus (SLE) – It is an inflammatory disorder of the skin and internal organs.
Loose Connective Tissue Functions
Thus, they form permanent tissue. Phloem is also made of four different types of elements Live plant cells that are short, lignified and generally thin-walled.
The fibres and cells are loosely arranged in the semi-fluid matrix. Fibroblasts are found in developing tissues and play an important part in wound-healing. Fibroblasts or adipose cells are stationary and macrophages, mast cells, monocytes, lymphocytes are migrating cells. They secrete different types of fibres and matrices.
While doing work and running, you move your organs like hands, legs etc. Break of skeletal muscle cannot be the reason for bone dislocation as bones are joined by ligaments. Dislocation of bones occurs when joints held by ligaments get separated.
- Epithelial cells are the protective coverings that line most organs and cavities of our body.
- Among the cells, the fibroblasts are the predominant cells; other types of connective tissue cells are also present, along with nerves and blood vessels.
- Outer protective tissue of the plant undergoes changes with age.
- Adipose tissue present below the skin and between internal organs stores fat.
Plasma contains proteins, water, hormones, salts, etc. to transport to different parts of the body. The blood contains red blood cells (RBCs), white blood cells (WBCs) and platelets. The yellow marrow contains fat, whereas red marrow produces blood cells.
- (c) Skeletal muscles contract and pull the ligament to move the bones
- (d) Cells of striated muscles are multinucleate and unbranched
- A) Meristamatic tissue cells are continuously dividing and they have a prominent nucleus and a dese cytoplasm.
- Scleroderma- It is characterised by thickening and hardening of the connective tissue.
Short Answer Questions
Fats are stored in human body as Answer is Tendons are non-fibrous tissue and fragile. (c) Tendons are non-fibrous tissue and fragile (b) Two bones are connected with ligament
Tendons are fibrous tissues which are highly elastic and strong. Meristematic tissues are classified as apical, lateral and intercalary based on their location. Answer is (d) Skeletal muscles contract and pull the tendon to move the bones (d) Skeletal muscles contract and pull the tendon to move the bones (c) Skeletal muscles contract and pull the ligament to move the bones
Components and Composition of the Areolar Connective
Answer is (c) Conduction of water (c) Conduction of water Which is not a function of epidermis?
When the immune system of the body starts attacking healthy tissues, it is known as an autoimmune disorder. The two genetic disorders of connective tissue are epidermolysis bullosa (EB) and Marfan syndrome. There is substantial blood supply in bony tissues.
Phloem parenchyma is thin-walled living cells of parenchyma. They provide mechanical support to the tissue. Answer is (b) phloem fibres Osteocytes are found in bone. Basophils are found in blood
Epithelial cells have a lot of intercellular spaces (e) Epithelial layer does not allow regulation of materials between body and external environment. (c) Epithelial cells have a lot of intercellular spaces. The only living component of xylem is xylem parenchyma.
The most common is Ehlers-Danlos syndrome (EDS), which is a group of hereditary disorders that affect connective tissues. There are several diseases and conditions that cause problems with areolar connective tissue. It provides support and helps to protect organs, muscles, and many other tissues. Areolar tissues are widely distributed in the body and primarily function as a packing material between other tissues. Areolar connective tissue is a type of connective tissue. Lymph nodes, the spleen, and red bone marrow create a labyrinth-like stroma or internal structure, which can host several free blood cells (primarily lymphocytes).
Loose connective tissue function and examples
A person met with an accident in which two long bones of hand were dislocated. Their main function is absorption and secretion. They facilitate movement across the epithelial barrier. Columnar epithelium forms the lining of the stomach, small intestine and colon, forming the mucous membrane.
(a) Epithelial tissue is protective tissue in animal body. Xylem comprises tracheids, vessels, xylem parenchyma and xylem fibres. Because of a process called transpiration, the water is released from the plants in the form of vapours. (b) Filling of space inside the organs – (iv) Areolar tissue Xylem fibres provide structural rigidity and they have no role in conduction of water.
Except for phloem fibres, other phloem cells are living cells. Phloem fibres possess narrow lumen and they are thick-walled elongated spindle-shaped dead cells. The muscular tissue which functions throughout the life continuously without fatigue is Areolar tissue fills the space inside the organs and supports internal organs and helps in the repair of tissue. Cells in these tissues are filled with fat globules. Renal tubules and corpuscles in the kidney are formed by Cuboidal epithelium tissue.
The water conducting tissue generally present in gymnosperm is Epithelial tissues do not have intercellular spaces between them rather they are tightly bound together to make vegas casino app a continuous sheet. Answer is (c) Epithelial tissues have intercellular spaces between them (c) Epithelial tissues have intercellular spaces between them (b) Fats are stored below the skin and in between the internal organs
