Difference between cardiac muscles and striated muscles

Differences between dense regular and dense irregular connective tissue are given below

The bones have excessive calcification . So it is difficult to sty living cells in an untreated bones. For their study , the bone id first decacified in the same way as architecture of the matrix is studied after drying up of the living materials.

Collateral glands are two highly branched tubular glands in cockroach, which are unequal in size. Both the glands open on the dorsal side of the genital chamber. The secretion produced by these glands forms the oothecal case of the ootheca.

Swimming, leaping and walking are the modes of locomotion in frog.

Blood, Bone and cartilage are called connective tissue because
(i) they connect different tissues and organs
(ii) provide support to other structures of the animal body

In earthworm, intestine starts from the 15th segment onwards and continues till the last segment.

The earthworms make burrows in the soil of playground. This spoils the ground.

The skin in frog is richly supplied with blood and provides extensive surface for respiration.

Layers of the dermis of frog are
(i) The upper stratum spongiosum
(ii) The lower startum compactum

Setae are S-shaped structures present in the epidermal pits of the earthworm.

Dense areolar and adipose connective tissue

Origin Ectoderm , endoderm and mesoderm
Function Protection . secretion and absorption

Smooth muscle fibres taper at both ends. They do not show any striation.

Areolar tissue is the loose connective tissue made up of a sticky matrix with fibers like white collagen and yellow elastic fibers and abundant mucin content.

Adipose tissue is a flat storing connective tissue.Its matrix is packed with the large, spherical or oval fat cells or adipocytes.The fibres are few in number and form a loose network for supporting fat laden cells.

This tissue is found in the subcutaneous parts, in the mesenteries, covering of the heart and around the blood vessels and kidneys.The adipose tissue mainly stores reserve food.It acts as shock absorbing cushions around the heart, kidneys, eyeball, etc.

Difference between blood plasma and serum.

Similarities between cardiac and skeletal muscles The cardiac and skeletal muscles both are made up of elongated fibres, which have numerous myofibrils. The myofibrils of the cardiac muscles have the same structure as those of skeletal muscle and are made up of actin and myosin filaments. The cardiac and skeletal muscles fibres have dark and light bands.

The body cavity of cockroach is filled with haemolymph so, it is called haemocoel. Cuticle, epidermis and basement membrane are layer of body wall in cockroach.

The entire body of cockroach is covered by a hard chitinous exoskeleton (brown in colour) made of touch plates called sclerites. These are formed of chitin, a polymer of acetone cocaine polysaccharide molecule. The exoskeleton protects the body and provides space for the attachment of muscles.

Differences between male and female frog

Differences between Blatta orientals and Periplaneta americana are 

Features: Stratified epithelium is made up of many layers of cells. In the skin the innermost layers are made of cuboidal or squamous cells. The outer layers are made of keratinised epithelium. Keratinised epithelium cells have lost their nucleus and contain a lot of keratin that help in protection.
Role in the skin:
Keratinised stratified epithelium is found in the skin because-
1. This epithelium contains dead cells with a lot of insoluble protein called keratin therefore providing the epidermis of the skin with protection against germs and desiccation.
2. They have a minimum role in secretions in the skin.
3. The secretions in the skin are due to glandular epithelium and not by the keratinised stratified epithelium.