Transportr in Animal and Plants /NCERT Science class 7

 

                         

Transport in Animal  and Plants

 

Circulatory system :-
Blood :-

(i)Blood is the fluid which flows in the blood  vessels.
(ii)Blood transports substances like digested food from the small intestine to the often parts of the body.
(iii)Bloods carries oxygen  from lungs to the cells of the body.
(iv)It also transports waste for removal from the body .
(v)Blood is composed of a fluid called plasma in which different types of cells are suspended. 

                        Bloods has one rtypes of cells-

Where we know that RBC (Red Blood Cellss).

RED BLOOD CELLS is contain a red pigment called Haemoglobin.

(a)Haemoglobin binds  with oxygen and transport it to all parts of the body and ultimately to all the cells.

(b)RBC will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin .

(c)The presence of haemoglobin maked blood appear red.

Platelets :- Platelets or thromocytes are small colorless cell fragments in our blood that from cloths and stop or prevent  bleeding.

Blood Vessels :-Blood vessels are different types of the body.Blood vessels are channels that carry blood thronocyts  our body.They form  closed loop like a circuit that begins and ends heart.

           Thhe heart vessels and blood vessels are form circulatory system.

(i)Arteries

(ii)Veins

(iii)Cappillaries.

(i)Arteries :- Arteries carry oxygen rich blood from the heart to all part of the body.

(ii)Veins :- Veins are the vessels which carry carbon dioxide rich blood form all parts of the body back to hearts.

                             The veins have thin walls.There are valves presents in veins which allow blood to flow only to walls of the body.

(iii)Cappillaries  :-Cappillaries is small blood vessels connect warteries and veins.

Also Related :-function of the Hearth…

Hearth:- (a)The hearth is  an organ which beets continuously to act as a pumps for the transport of blood which carries other substances  with it.

(b)The hearth is located chest cavitry with its lower trip to slightly tittled towards the left hold in fingures invades on our palm body.

(c)The Heart has  four  chamber .The two upper chambers  are called the atria.and the two longer lower chambers are called the ventricles.

(d)The Partition between the chambers helps to avoid mixingup of blood rich in oxygen with the blood rich in carbon die oxide.

 

Relatee Query :-Short notes on “Hearthbeat”

Heartbeet (i)The walls of the chambers of the heart are made up of muscles.

(ii)These muscles contract and relax rhythmically .This rhythmic concentration followed by hearth beets.

(iii) the hearth beats continue overy moment of our life.
Related :-Short nores on “Stethscope”

Stethscope  :-Stethscope  is a device where the doctor uses to amplipy the sound of the heart.

It consist a  chest  pipe-and it analysis a sensitive diagram and its have two hear piece and tube joining parts.

 

Transport of Sustances in plants :-

(i)We know that plant tubes water and minerals nutrioents from the soil through the roots and transport it to the leaves.

(ii)The leaves prepare food for the plants through the photosynthesis where it use carbon di oxide,Hydro oxide and sunlight.

Related :-How to water and minerals are transport in Plants ?

How to plants transport of water and minerals;

(i)Plants absorbed water and minerals by the roots.

(ii)The roots have roots hair.

(iii)The roots hair increase the surface area of the roots for the absorftion of water and minerals nutrient dissolved in water .The roots hair contect with  the water pressure between the soil particle.

    Plants have pipe-likie vessels to transport water and nutrients from the soil .Where vessels are forming vascular tissue.

Related :-Descriptibe about of function vascular tissue in plants.

Vascular Tissue:-A vascular tissue is made up in xylem and phloem.

Xyllem:- The vascular tissue fore the transport of water and nutrient  in the plant is called xylem.

Xyllem form a conytinuously  network of channel that connects roots to leave  through the stem and branches and thus transport water to entire body.

Phloem:- Phloem while transport Sucrose (Sugar)and amino acids between the leaves and other parts of the plants.

Related :-Short notes on ‘Transpiration”

Transpiratio:-Transpiration is the biological activity water is lost in the form of water vapours from the aerial parts of the plant.

       This process of elimination excess water from the plant  body is known as transpiration .If is generally the evaporation of water from the surface of the leaves.

Types of Transpiration:-

(i)Stomata Transpiration

(ii)Lenticular Transpiration

(iii)Cuticular Transpiration.