Parenchyma

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Parenchyma

Parenchyma is a term used to describe a bulk of a substance. It is used in different ways in animals and in plants.

The term is New Latin

New Latin

The term New Latin or Neo-Latin is used to describe a form the Latin language used after the end of the Medieval Latin period to c. 1900, and in a very limited fashion, down to the present day....
, from Greek

Greek language

Greek is an Indo-European languages native to the southern Balkan peninsula, the language of the Greek people. It forms an independent branch within Indo-European....
parenkhuma, visceral flesh

Flesh

Flesh is the soft part of the body of a person or animal which is between the skin and the bones. In ordinary speech, it typically contrasts with bone, as in the merism flesh and bone....
, from parenkhein, to pour in beside : para-, beside + en-, in + khein, to pour.

In animals
The parenchyma are the functional parts of an organ

Organ (anatomy)

In biology, an organ is a biological tissue that performs a specific function or group of functions. Usually there is a main tissue and sporadic tissues....
in the body. This is in contrast to the stroma

Stroma (animal tissue)

In animal tissue, stroma refers to the connective, non-functional supportive framework of a biological cell , biological tissue, or Organ ....
, which refers to the structural tissue of organs, being exactly, connective tissues.

In cancer

Cancer

Cancer is a class of diseases in which a group of cell display uncontrolled growth , invasion , and sometimes metastasis . These three malignant properties of cancers differentiate them from benign tumors, which are self-limited, do not invade or metastasize....
, the parenchyma refers to the actual mutant cells of a single lineage, whereas the stroma is the surrounding connective tissue

Connective tissue

Connective tissue is a form of fibrous biological tissue.It is one of the four types of tissue in traditional classifications .Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals, making up about 25% of the total protein content....
and associated cells that support it.

The mesodermal layer of the embryo develops into a loose collection of cells known as parenchyma tissue.

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In animals

The parenchyma are the functional parts of an organ

Organ (anatomy)

Stroma (animal tissue)

Cancer

Connective tissue

Organ	Parenchyma >- \| kidney Kidney The kidneys are Organ that have numerous biological roles. Their primary role is to maintain the homeostasis balance of bodily fluids by filtering and secreting Metabolomics#Metabolitess and minerals from the blood and excreting them, along with water , as urine....	nephron Nephron Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.... \|- \| lung Lung The lung is the essential respiration organ in air-breathing animals, including most tetrapods, a few fish and a few snails. In mammals and the more complex life forms, the two lungs are located in the chest on either side of the heart.... s	alveoli, respiratory bronchiole, alveolar duct and terminal bronchiole Pulmonary alveolus An alveolus is an anatomical structure that has the form of a hollow cavity. Found in the lung, the pulmonary alveoli are spherical outcroppings of the respiratory bronchioles and are the primary sites of gas exchange with the blood.... \|- \| spleen Spleen The spleen is an organ found in all vertebrate animals. In humans, the spleen is located in the abdomen of the body, where it functions in the destruction of redundant red blood cells, and holds a reservoir of blood....	white pulp and red pulp \|- \| brain Brain The brain is the center of the nervous system in all vertebrate, and most invertebrate, animals. Some primitive animals such as cnidarian and echinoderm have a decentralized nervous system without a brain, while sponges lack any nervous system at all....	neuron Neuron Neurons are responsive cell in the nervous system that process and transmit information by electrochemical Signal . They are the core components of the brain, the vertebrate spinal cord, the invertebrate ventral nerve cord, and the peripheral nerves.... \|- \| liver Liver The liver is a vital organ present in vertebrates and some other animals; it has a wide range of functions, a few of which are detoxification, protein synthesis, and production of biochemicals necessary for digestion....	hepatocyte Hepatocyte Hepatocytes make up 70-80% of the cytoplasmic mass of the liver.These cells are involved in protein synthesis, protein storage and transformation of carbohydrates, synthesis of cholesterol, bile salts and phospholipids, and detoxification, modification and excretion of exogenous and endogenous substances....

In plants

Parenchyma cells are thin-walled cells

Cell (biology)

The cell is the structural and functional unit of all known Life organisms. It is the smallest unit of an organism that is classified as living, and is often called the building bricks of life....
of the ground tissue

Ground tissue

The types of ground tissue found in plants develop from ground tissue meristem and consists of three simple tissues:* Parenchyma * Collenchyma ...
that make up the bulk of most nonwood

Herbaceous

A herbaceous plant is a plant that has leaf and stem that die down at the end of the growing season to the soil level. A herbaceous plant may be Annual plant, Biennial plant or Perennial plant....
y structures, yet sometimes their cell walls can be lignified. Parenchyma cells in between the epidermis

Epidermis (skin)

The epidermis is the outermost layer of the skin, composed of terminally differentiated stratified squamous epithelium, acting as the body's major barrier against an inhospitable environment....
and pericycle

Pericycle

}The pericycle is a cylinder of parenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.In dicots, it also has the capacity to produce lateral roots....
in a root

Root

In vascular plants, the root is the organ of a plant body that typically lies below the surface of the soil. This is not always the case, however, since a root can also be aerial root or aerating ....
or shoot

Shoot

Shoots are new plant growth, they can include plant stem, flowering stems with flower buds, leaves. The new growth from seed germination that grows upward is a shoot where leaves will develop....
constitute the cortex

Cortex (botany)

In botany, the cortex is the outer of the plant stem or root of a plant, bounded on the outside by the Epidermis and on the inside by the endodermis....
, and are used for storage of food. Parenchyma cells within the center of the root or shoot constitute the pith

Pith

Pith is a light substance that is found in vascular plants. It consists of soft, spongy parenchyma cells, and is located in the center of the Plant stem....
. Parenchyma cells in the ovary constitutes the nucellus and are brick-like in formation. Parenchyma cells in the leaf constitute the mesophyll; they are responsible for photosynthesis and they allow for the interchange of gases.